7. Now design your own track which has at least 2 loops of different heights and sketch below. What must you do to make the skater clear both loops? 8. How would the motion of the skater change if you add friction to the system? 9. Challenge: Assume friction is significant (non-negligible). Is the force of friction constant or does it change during the motion of the skater in the first skate ramp? 10. Challenge: Assume friction is significant (non-negligible). Sketch a graph on the back of this sheet showing gravitational potential energy, kinetic energy, and thermal energy as a function of time for the first skate ramp