Analysis: 1. Potential Energy is the energy in an object because of its 2. Kinetic Energy is the energy of The total energy of the skateboarder remains 3 . What does gravitational potential energy depend on? a. Position b. Air Resistance C. Gravity d. Both a and c 4. What can you conclude regarding the relationship between kinetic energy and potential energy? 5. How are kinetic energy and speed related? 6. The following is a graph of the energy of a skateboarder as he travels down a track. Using the diagram on the left, at which point on the track does the graph correspond to? Energy () B a. Point A b. Point B Total Kinetic Thermal Potential c. Point C 7. Your friend plays soccer. Describe a situation in a soccer game where your friend would have: High Kinetic Energy: Low Kinetic Energy:10. 11. Pay attention to the speed and energy chart. What do you notice about speed and the different types of energy? In general. as speed increases, potential energy and kinetic energy Part 3: Friction 12. 13. 14. 15. 16. 17. 18. 19. Click on the 'friction' tab at the very bottom of the simulator. You should notice a new slider for friction under the tab for mass. Click all boxes. except the pie chart. Put the skater on the track and look at the energy chart. Let the simulation run until the skater stops. Describe what happened to the bars for potential and kinetic energy What happened to the \"thermal\" bar. Run the simulation again. What happens to the total energy bar? Run the simulation again and watch the speed. What happens to the speed as the simulation runs? What do you think would happen if we raised the friction? Where do you think the thermal energy comes from? Part 4: Design your own skate track. 20. 21. 22. 23. 24. 25. 26. At the bottom of the simulation, press 'playground'. You will now get to design your own track. As you design your track. keep in mind the things we learned about potential energy, kinetic energy and speed. if the skater was not able to complete your track. revise your design. Make sure to include at least one bill and one loop. Also, leave the friction slider to the middle position. To build your track you drag the red bar with the three circles onto the screen. You can bend, stretch and change the bar as you want. To start another part of the track, drag another line onto the screen. Below is a sample. Print (or screen capture) your track and include it in your drop box upload for this lab. Here are two ways you can do this: A) Type Ctrl P at the same time. This will bring you to a print screen menu. Print your le to a printer. B} Type Ctri P at the same time. This will bring you to a print screen menu. Under the print button. you will see 'destination'. Click on change. and you should see the option to save as a Procedure: Part 1: Potential and Kinetic Entry I. At the bottom of the applet, click on the 'lntro' tab. 2. Click on the box for pie chart and put the skater on the track. You should see the amounts of potential and kinetic energy change as the skater moves up and down the track As the skateboard rolls down the ramp it loses energy and gains energy. 3. Fill out the chart below: Skater's Movement Potential Energy Kinetic Energy Up the hill 4. Now click the box for 'bar chart'. You will see four things on the horizontal axis: kinetic. potential, thermal and total. in this part of the tab, the thermal bar will not move, because we will not introduce friction until later. 5. You should see the kinetic energy bars rise and fall. What do you notice about the total energy bar? . 6. Using the Conservation of Energy. explain why this happens 7. Experiment with the other track designs. For track #3, click 'slow' and study the changes in kinetic and potential energy. Does the total energy remain the same in all cases? Part 3: Speed 8. Reset the simulation and click the bar chart and speed boxes. 9. Put the skater on the track and let him go