Motion Simulation #1: The Moving Man


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1 Name Period Date Motion Simulation #1: The Moving Man Objective: To explore, interpret, and create position, velocity and acceleration graphs. Accessing Simulation: Method 1: Go to class website, go to the page Computer Labs, click on the link Moving Man Simulation. Click Run now or download to start the simulation. Method 2: Through a web browser, navigate to Click "Play with Sims," then "Physics," then "Motion," then choose the "Moving Man" simulation. Click "Run now" or Download to start the simulation. Part 1: Introduction Play with the controls of the simulation to get used to the controls. Can you find... q two ways to move the man around? q how to make the man move automatically? q how to record and playback the man's motion? q how to playback the man's motion in slow motion? q how to quickly reset the man to starting conditions? Constant Velocity 1. Reset all of the man's values to zero. 2. Using the position slider, set the man to stand near the tree. Give him a velocity of 1.2 m/s (and an acceleration of 0). a. What distance will the man have to travel to reach the wall? b. Predict how long it will take until the man reaches the wall. c. How did you devise your prediction? 3. Click! to start the man in motion until he hits the wall, then hit "to stop recording. a. Using words, describe the motion of the man. 4. Use the playback feature to answer these questions. a. What happened to the blue position slider as the man moved across the screen? b. What happened to the red velocity slider as the man moved across the screen?
2 5. Use the playback feature to record the man's position and velocity data. At what time does the man hit the wall? Time (s) Position (m) Velocity (m/s) Plot your data in the graphs below: 8 Position (m) Velocity (m/s) Time (s) 7. According to your graphs... a. What shape is your position graph? (horizontal, vertical, diagonal, or curved) b. What is the slope of your position graph? (Slope = Δy/Δx; include the units) c. Why do or don't your answer to a. and b. make sense? d. What shape is your velocity graph? horizontal, vertical, diagonal, or curved? e. What is the slope of your velocity graph? (Slope = Δy/Δx; include the units) f. Why do or don't your answers to d. and e. make sense?
3 Constant Acceleration 1. Reset all of the man's values to zero. 2. Set the man to stand near the tree. Give him a velocity of 0 m/s and acceleration of 0.5 m/s 2. a. What distance will the man have to travel to reach the wall? b. Predict how long it will take until the man reaches the wall. c. How did you devise your prediction? 3. Click! to start the man in motion until he hits the wall, then hit "to stop recording. a. Using words, describe the motion of the man. 4. Use the playback feature to answer these questions. a. What happened to the blue position slider as the man moved across the screen? b. What happened to the red velocity slider as the man moved across the screen? c. Which slider moved the fastest? (had the greatest rate of increase?) 5. Use the playback feature to record the man's position and velocity data. At what time does the man hit the wall? Time (s) Position (m) Velocity (m/s) Plot your data in the graphs at right: Position (m) Time (s) Velocity (m/s)
4 7. According to your graphs... a. What shape is your position graph? horizontal, vertical, diagonal, or curved b. Describe the slope of the curve in your position graph. c. Why do or don't your answers to a. and b. make sense? d. What shape is your velocity graph? horizontal, vertical, diagonal, or curved e. Why does or doesn't your answer to d. make sense? f. What is the slope of your velocity graph? (Include units) g. What does the slope of the velocity graph represent? Making Connections 1. What happens to the man when he is accelerating? 2. What is the difference between an object with constant acceleration and an object with constant speed? 3. Complete the following sentences: a. "The slope of a linear position graph tells us the of the object." b. "The slope of a linear velocity graph tells us the of the object." c. "For an object moving at a constant speed, we would expect to see a position graph with a shape and a velocity graph with a shape." d. "For an object moving at a constant acceleration, we would expect to see a position graph with a shape and a velocity graph with a shape."
5 Part 2: Charts Directions: Click on the tab marked charts. 1. Without using Moving Man, sketch what you think the graphs would look like for the following scenario and explain your reasoning. Scenario: The man starts at the tree and moves toward the house with constant velocity. Position  time graph Reasoning For Appearance Velocity  time graph Reasoning For Appearance Acceleration  time graph Reasoning For Appearance 2. Now, use the Moving man simulation to verify or correct your predicted graphs and reasoning with a different color pen. 3. Make new charts for each of the following scenarios. Predict what you think the graphs will look like, and then use Moving man to verify or correct your predicted graphs and reasoning with a different color pen. a. Scenario: The man starts three meters from the house and accelerates towards the tree.
6 b. Scenario: The man stands still while he talks on his cell phone at the middle of the sidewalk, then walks toward the house at a constant rate trying to get better cell reception. He comes to a sudden stop when the coverage is good (about a meter before the house) and stands still to finish his conversation. c. Scenario: The man starts close to the house, stands still for a little while, then walks toward the tree at a constant rate for a while, then the slows to a stop.
7 4. Look at your graphs, reasonings, and the corrections from questions 2 and 3. Talk about why some of your predictions were wrong and how your ideas about motion have changed. 5. Sketch the position, velocity and acceleration graphs for the following scenario: Scenario: A man wakes up from his nap under the tree and speeds up toward the house. He stops because he is worried that he dropped his keys. He stands still as he searches his pockets for his keys. Once he finds them, he continues calmly to walk toward the house and then slows to a stop as he nears the door. 6. Write a possible scenario for the graph at right. Discuss how velocity and acceleration is changing.
8 7. Write a motion scenario that you could test. Test it, and then write a description of how you used the program to generate the graphs. Sketch the graphs.
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