Run the simulation linked here.
1. Pull the bottom of the ramp down to the ground and measure the height of the skateboarder when he is at his highest. Calculate his potential energy if his mass is 75 kg (PE = mgh). Turn on the Energy vs. Position or Energy vs. time graph and see if you calculation is right.
2. Run the simulation until he is at the bottom of the ramp. What is his Kinetic Energy at the bottom (just read it from the graph or use Conservation of energy)?
3. Where did the Kinetic energy in #2 come from?
4. Change the skater to a the girl, measure the girl’s highest point and calculate her potential energy at the highest point.
5. What will be the girl’s kinetic energy at the bottom?
6. Run this simulation. Draw a picture in your notes and explain how this simulation shows energy conservation?
7. Where is the potential energy the greatest and the least? Where is the kinetic energy the greatest and the least?
8. Run this simulation. Draw a picture in your notes and explain how this simulation shows energy conservation?
9. Is energy conserved when friction is present?