Energy Skate Park

Explore Energy Skate Park: see kinetic & potential energy transform with friction & gravity!

Part 1: Kinetic and Potential Energy Review Use the animation below to answer questions 1 - 4. 1. When does the roller coaster have the most potential energy? At the top of the 1st hill. At the bottom of the 1st hill. At the top of the loop. At the bottom of the loop. 2. When does the roller coaster have the most kinetic energy? At the top of the 1st hill. At the bottom of the 1st hill. At the top of the loop. At the bottom of the loop. 3. When is the roller coaster gaining potential energy? When the roller coaster is falling. When the roller coaster is going up. 4. When is the roller coaster gaining kinetic energy? When the roller coaster is falling. When the roller coaster is going up. 5. Sort it Out! Classify each picture as kinetic or potential energy. Potential Kinetic 6. Match it Up! Potential Energy The energy stored in an object due to their position, tension, or reactivity. Kinetic Energy The energy of objects or particles in motion. Inertia An objects resistance to a change in motion. Friction The resistance one object or surface encounters when moving across another. 7. Choose the best word from the list to complete the text below. When you wind up a toy like the one shown, you are providing potential energy to the toy. When the toy is released, this energy is transferred to motion and the toy will show kinetic energy. Energy can be transferred between kinetic and potential energy and back again. 8. A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she stops to rest. Then she travels down the hill. The diagram show the rider in the three different positions.Which of these correctly describes the potential energy and the kinetic energy of the bicycle rider? As the rider reaches the bottom of the hill, her kinetic energy and her potential energy decrease. As the rider moves up the hill, her kinetic energy increases, and her potential energy decreases. When the rider goes down the hill, her potential energy increases, and her kinetic energy decreases. When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least. Part 2: Energy Skate Park Use the link below to access the skate park simulation. ‪Energy Skate Park‬ Learn about the physics behind objects in motion. See how friction and gravity can change motion. Create your own fun ramps to try out! PHET: Energy Skate Park Instructions Part 1 Procedure:1. Make sure to be on the "Intro" lab.2. STOP!Answer question 1.3. Leave all of the settings as they are. (Yes, you may choose whichever avatar you like.)4. Click the "+" button on the energy chart and the chart will appear.5. Hold the skateboard at the top of the ramp and observe the energy chart.6. STOP! Answer question 2.7. Release the skateboard and observe how the energy changes.8. STOP! Answer questions 3 and 4.9. Remove the skateboard from the track.10. Increase the friction to the half way point, run the simulation, and observe the energy chart.11. STOP!Answer question 5.12. Click the reset button in the bottom right corner of the screen. 1. What variables can you alter in this lab? Mark all that apply. Mass Friction Air Resistance Gravity Drag 2. Which types of energy appear on the chart with the skateboard at the top of the ramp? Mark all that apply. Kinetic Potential Thermal Total 3. What happens to the energy as the skateboard goes down the ramp? The total energy goes away but the other energy types remain the same. The total energy remains the same, kinetic energy appears, and potential energy stays the same. The total energy goes away, kinetic energy appears, but potential energy stays the same. The total energy remains the same and the potential energy is converted into kinetic energy. 4. What happens when the skateboard goes back up the ramp? The total energy stays the same and the potential energy becomes kinetic energy. The total energy stays the same and the kinetic energy becomes potential energy. The total energy changes, but the kinetic and potential energy remain the same. The total energy changes and the kinetic energy becomes thermal energy. 5. What happened to the energy after increasing the friction? The energy remained the same. The energy was converted entirely into kinetic energy. The energy was converted into thermal energy. The total energy in the system increased. Instructions Part 2 Procedure:12. Click the "+" button on the energy chart and the chart will appear again. Increase the friction back to the half way point, increase the gravity to the half way point and set your avatar's mass to 55 kg.13. While observing the total and potential energy, pick up your avatar and move them up and down on the simulation screen.STOP! Then answer questions 6 7.14. Increase your avatar's weight to 100 kg. While observing the total and potential energy, move your avatar to the top of the ramp. Make a mental note of how much energy was available. 15. Decrease your avatar's weight to 20 kg. While observing the total and potential energy, move your avatar to the top of the ramp.STOP! Answer question 8.16. Pull the timer app out of the tool bar and place it on the screen.17. Change your avatar's mass back to 55 kg, place the skateboard at the top of the ramp and release it. Then, start the timer (You will have to be quick). Stop the timer as soon as the skateboard stops.18. Record the end time in the cart under question 9 as the neutral time forfriction, gravity, and mass.19. Increase the friction all of the way and run the experiment again. Record the new time for increased friction in the chart under question 9.20. Decrease the friction to a little above none and run the experiment again. Record the new time for decreased friction.21. Repeat the previous steps to get the times for increased and decreased gravity. MAKE SURE TO REST FRICTION TO THE MIDDLE OF THE BAR BEFORE YOU START GETTING YOUR DATA FOR GRAVITY!22. Reset your gravity to the half way point and change the mass to 20 kg. Run the simulation and record the time for decreased mass in the chart.24. Increase the mass to 100 kg and run the simulation. Record your time in the chart.25. Answer questions 10 - 13. 6. As your avatar moves away from the ground what happens to the energy? The energy increases. The energy decreases. The energy stays the same. 7. As your avatar gets closer to the ground, what happens? The energy increases. The energy decreases. The energy remains the same. 8. How does mass affect the amount of energy available in a sysyem? Mass does not affect the amount of energy in a system. The greater the mass, the more energy there is in a system. The greater the mass, the less energy there is in a system. 9. Input your times into the data table below after making the changes in the procedure at the start of the lab. Variable Increase Neutral Decrease Friction Gravity Mass 10. When you increased the friction, what happened to the time it took for the skateboard to stop? The time increased. The time decreased. The time did not significantly change. 11. Why did this change in time happen? Increasing the friction also increased the inertia so energy was lost faster. Increasing the friction also increased the potential energy so energy was lost faster. Increasing the friction also increased the thermal energy created so energy was lost faster. There was no significant change to the amount of time when the friction was increased. 12. When the mass was increased, what happened to the time it took for the skateboard to stop? The time increased. The time decreased. The time did not significantly change. 13. Why did this change in time happen? The time decreased because the change in mass decreased the amount energy in the system. The time increased because the change in mass increased the amount energy in the system. Since the outside forces of gravity and friction changed, their effects remained constant. So, the change in mass only increased the amount of energy available. Since the outside forces of gravity and friction did not change, their effects remained constant. So, the change in mass only effected the amount of energy available. Let's Have Some Fun! Procedure:1. Click on the "Playground" tab.2. Set the friction to the middle of the bar.3. Create the craziest track that you can think of, it must have at least one loop, that your avatar can successfully travel through. Don't change any of the other settings.4. Answer question 14.5. Run your track through each of the different planetary settings.6. Answer questions 15 and 16. 14. Briefly explain the design process you went through to get your track to work. Upload a screen shot of your track into the box below along with your explanation. 5 pts 15. When you switched planetary locations, what variable changed? Friction Mass Gravity Air Resistance 16a. Did your track work on other planets?16b. Which one(s)?16c. Why do think this happened? 4 pts