Phet Simulations Projectile Motion

PHYSICSINMOTION LAB 7. 0 m above the floor. Set the initial speed for the projectile to 40 m/s. edu/sims/projectile-motion/projectile-motion_en. 4 *The Moving Man 49 2. Essential Physics eBook - Chapter 15 Review. PhET Simulation: Part One: Mechanics: Tavurvur Volcano Erupts @ TPT This is a video+PhET sim activity that uses a video capturing the beginning of a volcanic eruption to investigate projectile motion, the speed of sound, and adiabatic expansion. According to the graph and results in the table, we see that the height of the projectile is consistently 10. com/#!/NorthwestISD https://www. Lab Week 8: Projectile Motion The purpose of this lab activity is to use mathematical models to predict where a projectile will land. In addition to the shape and aerodynamics characteristics of the projectile, which would include not only its initial shape but distortions, and wind resistance characteristics of the composite material, it occurred to me that the prevailing winds and direction, height above sea level (if fired in a plane, for example) and even temperature and humidity (which are all quantifiable), could be. So let's not do that and instead write down those elements that affect it the most. Projectile Motion Simulator Worksheet - Free download as Word Doc (. To help students visually comprehend concepts, PhET simulations animate what is invisible to the eye through the use of graphics and intuitive controls such as click-and-drag manipulations, sliders and radio buttons. Now, we will try to explain motion in two dimensions that is exactly called "projectile motion". Try it and summarize your findings. Use the PhET simulation to test this theory. Record your findings. Projectile motion refers to the motion of an object that is projected into the air at an angle to the horizontal. First familiarize yourself with the program. Make sure if you stop working on the LoggerPro file that you upload it to Google Drive along with your video otherwise you won't be able to finish your video analysis. The aim of the project is provide realistic interactive science simulations appropriate for high school classes. So let's not do that and instead write down those elements that affect it the most. It is a work in progress, and likely always will be. Realize that while gravity (acceleration) acts on the projectile in the _____ direction, it does not affect the velocity of the projectile in the _____ direction. http://phet. the original parameter settings (angle, initial speed,. http://phet. Phet projectile motion lab answer key keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. We will learn what projectile motion is and how to analyze it using equations. You should have found that launch angle is a key variable. I created a projectile motion simulator which accounts for the effect of air resistance (drag) and the Magnus effect. Antonyms for Projectile motion. The object is called a projectile, and its path is called its trajectory. Neglecting air resistance, what is the angle at which an object hits the target at its original location? What angle of. Such a cannonball has a. ) Drop a ball from a height of 2 meters and, using a stopwatch, record the time it takes to reach the ground. An airplane is making an emergency drop of medical supplies to solders on the ground. http://phet. It is a work in progress, and likely always will be. Essential Physics eBook - Chapter 15 Review. The Projectile Motion with Angry Birds lab uses the Tracker video analysis tool to measure and analyze the motion an angry bird projected from a slingshot to hit. Determine a coordinate system. 3 *Projectile Motion 79. Initial conditions can be changed, as can the object fired. Blast a Buick out of a cannon! Learn about projectile motion by firing various objects. We will investigate 2D projectile motion, which can be described as accelerated motion in the vertical $(y)$ direction and motion at uniform velocity in the horizontal $(x)$ direction. The "Reset" button brings the projectile to its initial position. Investigate the variables that affect the drag force. Mechanic Web Quest. 4 - Thermodynamics PhET. Lab Objectives: 1- Learn about projectile motion by firing various objects. PhET “Projectile Motion. The cannon can be pivoted to change the firing angle, e. Projectile Motion Phet Simulations Lab Answers document other than just manuals as we also make available many user guides, specifications documents, promotional details, setup documents and more. An Advertisement for Honda. 1 Week of 9/30, Day 1-Lesson 3A: Marble in a Cup Lab and Finish Horizontal Launch Problems. hey guys I made a program about the projectile motion, so can you guys show me how to make the graphics simulation for that motion. Click INTRO to begin and follow your teacher's direction. A PhET simulation on Projectile Motion. After gaining insight, the students will contrast the motion of spherical objects with the motion of other objects that experience more air resistance. Honors 2 Projectile Motion: Textbook, Conceptual Physics, Paul Hewitt We're going to learn that the horizontal (sideways) component of motion is always independent of the vertical component of the motion. Title Projectile Motion: The Basic Flight Path: Description This activity is designed as a team activity and the instructions ask for both individual and group answers to questions The students will draw basic flight path of a projectile, altering that flight path as initial velocity and angle of launch are changed, The students will list and describe what the variables are in the flight path. Physics 2 Spring Semester – Unit I Circular Motion & Gravitational Force a. ‪Projectile Motion‬ - PhET Interactive Simulations. Our partners will collect data and use cookies for ad personalization and measurement. Phet projectile motion lab answer key keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. Procedures: Play with the Sims → Physics → Projectile Motion In most cases, you may use the simulation to check your work on math exercises. angle of projection less or greater than 45 degree will fall near the pro. php?sim=Projectile_Motion. Look at your notes and/or textbook. Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. Variable Predicted Effect of Variable On Motion of Projectile Inquiry Investigation – Online Simulation. Phet Sound Simulation Answers Key Phet: free online physics, chemistry, biology, earth , what is phet? founded in 2002 by nobel laureate carl wieman, the phet interactive simulations project at the. the X direction. Procedure: (we will be ignoring air resistance during this lab) Run the PhET Simulations Play. Kinematics of Projectile Motion. Add air resistance. 3 - Optics PhET. Set the initial speed for the projectile to 40 m/s. 6 - Modern Physics To download/view more simulations click here. In PhET, I was usually able to hit the middle of the target with the second try of each new scenario (wind resistance, new object, etc. Record your results. • Make a complete list of things that affect the landing site of a projectile including your ideas from question #1 above and any discoveries you made using the simulation. PhET Hooke’s Law: Spring Constant (k) PhET Masses & Springs When is a bungee jumper’s acceleration max? Horizontal projectile motion Notes 3. • Describe why using the simulation is a good method for studying projectiles. Projectile Motion "Projectile Motion" is an educational simulation in HTML5, by PhET Interactive Simulations at the University of Colorado Boulder. By manipulating angle, initial speed, mass, and air resistance, concepts of projectile motion come to light in a fun and game-like environment. PhET Simulation: Part One: Mechanics: Tavurvur Volcano Erupts @ TPT This is a video+PhET sim activity that uses a video capturing the beginning of a volcanic eruption to investigate projectile motion, the speed of sound, and adiabatic expansion. Set parameters such as angle, initial speed, and mass. Add air resistance. Click and drag the left-side of the cannon to decrease the height to 3 m. Parabola Projectile Trajectory Vy = decreasing Vy = 0 -Vy = increasing Vx = constant Range - max Dx traveled by projectile Height - Dy at given time Max height of projectile, Vy = 0 X-motion and Y-motion are independent Trajectory of object can be resolved into components to find two independent velocities Ax = Acosq = Vx Ay = Asinq = Vy. Click INTRO to begin and follow your teacher's direction. Projectile motion simulation. Projectile Motion Worksheet (Case 1) Methacton High School Physics Department 5. Honors 2 Projectile Motion: Textbook, Conceptual Physics, Paul Hewitt We're going to learn that the horizontal (sideways) component of motion is always independent of the vertical component of the motion. Projectile Motion. The cannon can be pivoted to change the firing angle, e. Launching a Projectile with a non-zero Starting Height. PROJECTILE MOTION WORKSHEET A ball is kicked horizontally at 8. This HTML5 app shows the motion of a projectile. Sample Learning Goals. 0 m/s from a cliff 80m high. Simulation: Graphs and Tracks 3: 28 Sep 2018 (Fri) Quiz: Kinematics; Notes: Projectile Motion; Worksheet: Projectile Motion (Horizontally Launched) Worksheet: More Projectile Motion (Horizontally Launched) Worksheet: Projectile Motion (Launched at Angles) Kinematics Provincial Exam Package. PhET provides fun, free, interactive, research-based science and mathematics simulations. Assignment. In addition to the shape and aerodynamics characteristics of the projectile, which would include not only its initial shape but distortions, and wind resistance characteristics of the composite material, it occurred to me that the prevailing winds and direction, height above sea level (if fired in a plane, for example) and even temperature and humidity (which are all quantifiable), could be. Virtual Trebuchet 2. Make a game out of this simulation by trying to hit a target. Set the angle, initial speed, and mass. Newton’s First Law and Free Body Diagrams. uk/web/future. Projectile Motion Applet - from PHET. pdf Projectile Motion 2. Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. edu/simulations/sims. Select “Run Now”. Phet Projectile Motion Lab: Lab Answers | SchoolWorkHelper Introduction This lab will answer whether or not initial speed affects the time that a projectile is in the air. Projectile Motion formula is made use of to calculate the distance, velocity and time engaged in the projectile motion. 6 - Modern Physics To download/view more simulations click here. The most I got out of it (I think) were all the variables that affect projectile motion--along with "which way" they affect the motion. edu/sims/projectile-motion/projectile-motion_en. a) Assume there is no drag (set coefficient of drag to 0). Then, resolve the position and/or velocity of the object in the horizontal and vertical components. PhET Simulation: Projectile Motion. exe file which you use to help understand graphing motion) NASA Movie of hammer and feather dropped on the moon. com/NorthwestIndependentSchoolDistrict https://twitter. Projectile Motion. Deployment of a computational physics simulation/model is extremely complex given the fact that both knowledge and skills for the science equations and the computational and programming aspects are required for a fully functional simulation, typically requiring a science educator and. An airplane is making an emergency drop of medical supplies to solders on the ground. edu/) from University of Colorado at Boulder. Click on "Go to Simulations". What angle causes the largest height? b. Upon reaching the edge of the table, it follows a parabolic path to the floor. Honors 2 Projectile Motion: Textbook, Conceptual Physics, Paul Hewitt We're going to learn that the horizontal (sideways) component of motion is always independent of the vertical component of the motion. Projectile motion is a form of motion experienced by an object or particle (a projectile) that is thrown near the Earth's surface and moves along a curved path under the action of gravity only (in particular, the effects of air resistance are assumed to be negligible). AP Physics B Name Vinh Vu Period 2 PhET Projectile Motion Lab Google "PhET Projectile", it will be the first hit (if you NEED a URL, it's ) Then click the button beneath the picture. Type “projectile” into the search engine on the web site. Using the tape measure, place the target 20m from the cannon. Acid-Base Solutions: Area Builder: Arithmetic: Atomic Interactions: Balancing Act: Balancing Chemical Equations: Balloons and Static Electricity: Beer's Law Lab. First familiarize yourself with the program. 5 - Electricity and Magnetism PhET. In addition to the shape and aerodynamics characteristics of the projectile, which would include not only its initial shape but distortions, and wind resistance characteristics of the composite material, it occurred to me that the prevailing winds and direction, height above sea level (if fired in a plane, for example) and even temperature and humidity (which are all quantifiable), could be. In this section, we consider two-dimensional projectile motion, such as that of a football or other object for which air resistance is negligible. Circle one. 0 m/s across a level table that is 1. Also, the surface is assumed have a constant reflection coefficient of 0. Move the ball with the mouse or let the simulation move the ball in four types of motion (2 types of linear, simple harmonic, circle). The Projectile Motion with Angry Birds lab uses the Tracker video analysis tool to measure and analyze the motion an angry bird projected from a slingshot to hit. Select Open With Firefox Web Browser option. Horizontal Projectile Motion Answer all questions on a separate piece of paper. Use Ladybug Motion 2D to check your ideas. Therefore, the height, a vertical component of the projectile, is directly related to the time, and the initial speed is not related at all. About oPhysics The oPhysics website is a collection of interactive physics simulations. edu/en/simulation/projectile-motion. Ability to change velocity and acceleration of each object. if statement in c program. Projectile motion is a form of motion experienced by an object or particle (a projectile) that is thrown near the Earth's surface and moves along a curved path under the action of gravity only (in particular, the effects of air resistance are assumed to be negligible). 2; PhET: Projectile Motion; 17: 08 Nov 2018 (Thu) Worksheet: More Projectile Motion (Horizontally Launched) 18: 14 Nov 2018 (Wed) Quiz: Projectile Motion (Horizontally Launched) Worksheet: Projectile Motion (Launched at Angles) 19. Go to the PhET web site. To do this, students access a PHET simulation on gravity. Projectile Motion simulation (can use w/ Angry Birds) launch a buick out of a cannon. Projectile Motion Simulations Perform this simulation lab before next class. Instructions: This is a take-home test to cover the Chemistry Unit. Discuss projectile motion using common vocabulary (such as: launch angle, initial speed, initial height, range, time). Scribd is the world's largest social reading and publishing site. Play around with the various things you can change. 7 Vector Addition 13 2. Differentiation Strategies in a Projectile Motion in a Projectile Motion Lesson Plan - authorSTREAM Presentation problems and the PhET simulation Verbal. Calculate the range (final horizontal displacement) of the ball. Experimental data will be acquired and compared to the theoretical results. The database contains hundreds of activities that you can download for free, including labs, homework assignments, lectures, activities, concept questions, and more. Projectile definition is - a body projected by external force and continuing in motion by its own inertia; especially : a missile for a weapon (such as a firearm). The Moving Man; Projectile Motion; Projectile Motion. ½ the velocity gives ½ the "hang" time but also ½ the horizontal velocity. Changing one variable at a time, analyze how each variable affects the motion of a projectile. PHeT – projectile motion. The William and Flora Hewlett Foundation Makes grants to address the most serious social and environmental problems facing society, where risk capital, responsibly invested, may make a difference over time. Blast a Buick out of a cannon! Learn about projectile motion by firing various objects. If you can't get to it directly, try www. Blast a Buick out of a cannon! Learn about projectile motion by firing various objects. Passionate about something niche? Reddit has thousands of vibrant communities with people that share your interests. Hypothesis Practice: Day 2: Data Collection: Experiment # Independent Variable Dependent Variable 1 angle range 2 angle height 3 angle time 4 Initial speed range 5 Initial speed height 6 Initial speed time 7 Mass range 8 Mass height 9 Mass time 1. Our partners will collect data and use cookies for ad personalization and measurement. PhET Interactive Simulations | PhET provides fun, interactive, research-based simulations of physical phenomena for free. Book a 1-on-1 Walkthrough. PROJECTILE MOTION WORKSHEET INTRODUCTION On PhET website go to Simulations -> Physics -> Motion -> Projectile Motion clicking on the image allows you to run the simulation. Lab Week 8: Projectile Motion The purpose of this lab activity is to use mathematical models to predict where a projectile will land. Use the Escape key on a keyboard (or comparable method) to exit from full-screen mode. conceptual physics projectile motion answers. 2 - Waves and Sound PhET. Below is a complete list of things that you can change and things that can be measured. PhET SIMULATIONS Available in the Pearson eText and in the Study Area of MasteringPhysics *Indicates an associated tutorial available in the MasteringPhysics Item Library. Graph constant velocity vs. Go to the PhET web site. Select a simulation from one of the above categories or click on a category to see descriptions of the simulations for that category. Click INTRO to begin and follow your teacher's direction. simulation. the X direction. Calculate the range (final horizontal displacement) of the ball. The "Reset" button brings the projectile to its initial position. com More Projectile Motion to find the simulation. Procedure: Part I: Horizontal launch velocity vs. The project was founded by Carl Wieman at the University of Colorado at Boulder. • Make a complete list of things that affect the landing site of a projectile including your ideas from question #1 above and any discoveries you made using the simulation. PhET simulations and resources are freely available at the PhET website (https://phet. What variables determine whether or not you make the shot? _____ Key Projectile Motion Measurements Write out a definition for each term below. Projectile Motion Phet Simulations Lab Answers are becoming more and more widespread as the most viable form of literary media today. PhET provides fun, free, interactive, research-based science and mathematics simulations. txt) or read online for free. PhET Simulations on the Legends Platform. Privacy & Cookies: This site uses cookies. The object is called a projectile, and its path is called its trajectory. A simulation of projectile motion. Simulations on a wide range of topics are available, including Newton's Laws, electricity, light and quantum physics. Test Your Idea with a PhET Simulation. In this lesson, students in grades 5-8 use a hands-on activity, an online video from "Science of NFL Football," and a computer simulation project to learn about projectile motion and how variables affect a projectile's range and time in the air. So let's not do that and instead write down those elements that affect it the most. When simulations end, the saved results are used to animate the firing sequence and to display the values at each time interval. Projectile Motion: My Solar System: Friction: Lunar Lander: Forces in 1 Dimension: Maze Game: Ladybug Motion 2D: Calculus Grapher: Gravity Force Lab: Motion in 2D: The Ramp: Forces and Motion: Ramp: Forces and Motion: Buoyancy. First familiarize yourself with the program. The Physics Classroom, The Laboratory, Projectile Simulation Students use an online simulation to investigate the motion parameters of a projectile at a variety of locations along its trajectory. Set the angle, initial speed, and mass. com/class/vectors/u3l2e. Projectile Motion The purpose of this lab is to study the properties of projectile motion. Don’t download the simulation, just run it from the location. When the can is empty, you decide to throw it in the trashcan. http://phet. Hypothesis Practice: Day 2: Data Collection: Experiment # Independent Variable Dependent Variable 1 angle range 2 angle height 3 angle time 4 Initial speed range 5 Initial speed height 6 Initial speed time 7 Mass range 8 Mass height 9 Mass time 1. How far from the base of the cliff will the stone strike the ground? How long will it take a shell fired from a cliff at an initial velocity of 800 m/s at an angle 300 below the horizontal to reach the ground 150m below?. King Saud University seeks to become a leader in educational and technological innovation, scientific discovery and creativity through fostering an atmosphere of intellectual inspiration and partnership for the prosperity of society. Determine the vertical and horizontal components of the projectile. This assumption simplifies the mathematics greatly, and is a close approximation of actual projectile motion in cases where the distances travelled are small. 2 Observe and Explain The initial velocity of the object is 20 m/s. Note the choices in the left hand column. Investigating Projectile Motion: Creating a Catapult Abigail M. PROJECTILE MOTION WORKSHEET A ball is kicked horizontally at 8. Physics Playing with Projectiles - PhET Simulation ! Name:_____Block:_____!! Today!you!will!be!playing!with!aPhET!simulation!to!further!explore!projectile!motion. Go to the PhET web site. the original parameter settings (angle, initial speed,. Realize that while gravity (acceleration) acts on the projectile in the _____ direction, it does not affect the velocity of the projectile in the _____ direction. Simulation stops when the projectile reaches ground level. We do exciting things like throw things off cliffs (far safer on paper than in real life) and see how high a ball will fly in the air. Make a complete list of things that affect the landing site of a projectile including your ideas from question #1 and any discoveries you made using the simulation. An arrow is shot at a target as shown below. Powerpoint (14 slides) that details the physics of projectile motion (horizontal launch) 4. Make sure if you stop working on the LoggerPro file that you upload it to Google Drive along with your video otherwise you won't be able to finish your video analysis. In addition, this lab will demonstrate the importance of considering uncertainties in all measurements and calculations. Mechanic Web Quest. Horizontal motion : uniform morion (constnat velocity) has the copyright on all the simulations in this website. txt) or read online for free. Projectile Motion Solved Examples Underneath are questions based on projectile motion which may help one in their exam. PhET Projectile Motion Simulation Investigation Syllabus Dot Point • perform a first‐hand investigation, gather information and analyse data to calculate initial and final velocity, maximum height reached, range and time of flight of a projectile for a. By manipulating angle, initial speed, mass, and air resistance, concepts of projectile motion come to light in a fun and game-like environment. The acceleration and velocity in the Y direction is independent of the acceleration (if any) and velocity in the X direction. Use the simulation to test your predictions. In this simulation, students can fire various objects out of a cannon, including a golf ball, football, pumpkin, human being, a piano, and a car. Projectiles launched at an angle. Projectile motion refers to the motion of an object projected into the air at an angle. Launching a Projectile with a non-zero Starting Height. • Make a complete list of things that affect the landing site of a projectile including your ideas from question #1 above and any discoveries you made using the simulation. Describe all the vectors acting on a projectile during its flight. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile motion in which there is no horizontal movement. Look at the top of the screen. Make a game out of this simulation by trying to hit a target. com/class/vectors/u3l2e. Fill in the table below with the variables and their effect on the motion of the projectile. They observe and describe how motion projectile motion looks. Projectile Motion II PhET Simulation Lab. Complete the table below by listing what YOU THINK are the variables involved in projectile motion and describe what YOU THINK their effect will be on the flight path. Using First order Backward Finite Difference technique, the trajectories of a projectile motion ( a bouncing ball) is solved for 2 cases: With and without the effect the air drag. Determine a coordinate system. Assumption: Acceleration due to gravity, g, is constant (9. Conservation of momentum Lab - PhET Simulations Momentum and Simple 1D Collisions. Related Web Sites Projectile Motion Applet - another well-done cannon simulation from Michigan State University. According to the graph and results in the table, we see that the height of the projectile is consistently 10. simulation. Created by three Ph. (In drawing this theoretical curve we have neglected the uncertainty in h which is small compared to the spread of data points. edu/en/simulation/projectile-motion. Choose a projectile to launch, along with its launch parameters. Then, resolve the position and/or velocity of the object in the horizontal and vertical components. Essential Physics eBook - Chapter 15 Review. Procedures: Play with the Sims → Physics → Projectile Motion In most cases, you may use the simulation to check your work on math exercises. This results in ¼ the range. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile motion in which there is no horizontal movement. Projectile Motion Objective The projectile motion experiment applies a working knowledge of kinematics for motion intwo dimensional space. The acceleration and velocity in the Y direction is independent of the acceleration (if any) and velocity in the X direction. You can choose the object by clicking on one of the objects in the scroll-down menu at top right (a cannonball is not among the choices). 0 International License. • Make a complete list of things that affect the landing site of a projectile including your ideas from question #1 above and any discoveries you made using the simulation. 1 Week of 9/30, Day 1-Lesson 3A: Marble in a Cup Lab and Finish Horizontal Launch Problems. Now, we will try to explain motion in two dimensions that is exactly called "projectile motion". Projectile motion refers to the motion of an object projected into the air at an angle. Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. 0 km/hr directly parallel to the ground from a height of 230. Projectile motion results when an object is subject to a single force: the constant force of gravity. In this module, you will investigate the motion of a simple projectile. When the angle of projection is 45 degree, it will fall at maximum range. ‪Projectile Motion‬ - PhET Interactive Simulations. Physics 2 Spring Semester – Unit I Circular Motion & Gravitational Force a. One day after school, you are enjoying a soda in the back yard. Projectile Motion. Ideal projectile motion states that there is no air resistance and no change in gravitational acceleration. Vector Addition; 3 Kinematics. 0 International License. physicstutoronline. Look at the top of the screen. Select the option Open With Firefox Web Browser. http://phet. ½ the velocity gives ½ the "hang" time but also ½ the horizontal velocity. Determine that the x and y motion of a projectile are independent. Created by three Ph. Short video on how to use some of the features of the PhET Projectile Motion simulation. Next, download the activity PDF file called Friction Force Simulations Lab. This collection of interactive simulations allow learners of Physics to explore core physics concepts by altering variables and observing the results. Draw what you think the position vectors would look like at the locations shown in Figure 2. The William and Flora Hewlett Foundation Makes grants to address the most serious social and environmental problems facing society, where risk capital, responsibly invested, may make a difference over time. c) PhET, PhET Interactive Simulations In the simulation below, you will be able to launch a variety of objects out of a cannon. Projectile Motion simulation (can use w/ Angry Birds) launch a buick out of a cannon. 0 m/s from a cliff 80m high. December 7, 2017. the original parameter settings (angle, initial speed,. Assignment. PHET Sims: Friday, August 23 PHET Sims. Projectile motion lab using a free, online simulation (simulation can be downloaded ahead of time and run locally on a Mac, PC or Linux machine, negating need for internet) 3. At EDinformatics we are transitioning from Java, Shockwave and Flash to HTML5 Simulations which can easily be used on all platforms. Use the simulation to test your ideas about the things that affect the. Adjust angle, muzzle velocity, add air resistance, if you want. Use the online simulation for projectile motion to complete this question. Circle one. Projectile Motion Worksheet. http://phet. Use a simulator at PHET, collect data on how far projectiles can be launched from a cannon. Set parameters such as angle, initial speed, and mass. Games for when you are done to test your knowledge:. A tape measure is present to help you measure heights and distances. Oh boy! The answer to this question has the potential to get very deep and technical and complicated. Variable Actual Effect of Variable On Motion of Projectile Design a Test: You've heard the claim that a bullet shot horizontally will strike the ground at the same time as a bullet dropped from the same height. Make a game out of this simulation by trying to hit a target. To begin, enter the parameters of your trebuchet in the input boxes on the left. Set the angle, initial speed, and mass. PhET: Resistance in a Wire. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: