Moving Man Introduction Motion in 1 Direction

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1 Moving Man Introduction Motion in 1 Direction Go to and Click on Play with Sims On the left hand side, click physics, and find The Moving Man simulation (they re listed alphabetically!) Open up The Moving Man simulation Learning goals: Students will be able to accurately interpret and draw position and velocity graphs for common situations and explain their reasoning. Background Remember diagrams and graphs are not just evil things Mrs. Whitt makes you create. They are a means of communication. Graphs are a way of communicating by using pictures and since a picture is worth a thousand words knowing how to make and interpret graphs will save you a lot of writing! Activity: Getting Started For this assignment, you will use the Moving Man simulation. As you work through these problems focus on making sense of the graphs that are a result of the motion. Discuss your reasoning with your classmates! 1. Open The Moving Man and view how the simulation works on the introduction tab. 2. Investigate Moving Man by dragging the guy around with your mouse. Part 1 (move the man by dragging him with your mouse) 1. Move the man steadily to the right towards the house. Describe his position. (hint: Constant? Changing? Negative? Positive?) 2. Hit the Reset All button. Move the man steadily to the left towards the tree. Describe his position. Compare/contrast the man s position from #1 to his position from #2. 1

2 Part II 3. Now open the charts tab. Leave the position graph (distance vs. time graph) open, but close the velocity and acceleration graphs by clicking on the blue minus buttons in the right upper corner of that graphs. Your screen should look like the one at the right. His starting point is the origin. 4. Try making the man move using the slider arrows. Find as many ways as possible to move the man 1 m in 2 s. Describe at least two ways here:. Use the playback features to look at the graphs that are generated from the moving man. Explain why the graphs look the way they do. 6. Investigate the types of variables you can change and the type of data that results. 7. Sketch two of the graphs produced in # above on the axes provided below: + Position (m) + position (m) - - 2

3 Physical Science 8. Without using Moving Man, sketch what you think the d-t graphs would look like for the scenarios below. Don t worry about being wrong (and don t cheat by looking at Moving Man first!) A man standing still at 4m A man moving from m to 1m at a slow steady pace, then moving back to -2m at a fast pace A man moving from m to -1m at a slow steady pace A man moving from m to 1m at a slow steady pace

4 A man moving from m to 1m at a fast pace A man moving from m to -1m at a slow steady pace Run the Moving Man sim and see if you were correct. If the correct, put a on the graph. If your prediction was not correct, correct the graph by drawing a second line in a different color on the graph to show the correct graph. Part III 1. Again, without using Moving Man, sketch what you think the d-t graphs would look like for the scenarios below. Then run the scenario and see if you were correct. If not, show the correct graph in a different color and explain your mistake. The man is sleeping under the tree for a short time; when he wakes up he runs towards the house at a constantly increasing pace. Explanation for any mistakes:

5 Physical Science A man is running down the street. He stops to pick up a dollar bill he sees laying on the pavement. He turns around and begins walking home. He stops after 2 meters to tie his shoe. Then stands up and again runs the remainder of the way home, accelerating the entire way Explanation for any mistakes: 11. Now use the Special Features menu to remove the walls (select Free Range ). Clear the graphs. Using the same boxes on the left side, type in values for position, velocity and acceleration that will cause the man to start at the right side of the screen, move to the left and go off the screen and then eventually come back crossing the screen to the right. Click GO to make him start after you have typed values into the boxes. Click STOP after he runs off the screen to the right. (Keep trying until you get it) What values for x =, v =, and a = did you use? Explain why these values are needed to achieve this. 12. Write a motion scenario that you could test. Test it, and then write the scenario along with a description of the settings you used to generate the graph. Sketch the graph below Apply what you have learned 13. Based on you experience with Moving Man, how would you define position?

6 14. Look at the graph below and for the different parts of the graph that are marked, write a statement about what is happening. Be sure to include the direction of motion and the speed of motion. Part B Part C Part D Part A Part E Part F Part A B C D E F Description of direction and speed 1. EXPLAIN the difference in motion represented by a straight line and a curving line on a distance vs. time in terms of constant or changing speed. 16. EXPLAIN the difference between the motion represented by a flat line and a sloping straight line in a distance vs. time graph. 17. Describe how the man could have negative position while having a positive velocity. 18. Write a possible story for the following graph. 6