Activity C (continued from previous page)
19. Calculate Now, set the coefficient of friction to 0.10. Keep the same car and the same hill
height.
A. What is the initial potential energy of the car, in joules?
B. What is the final velocity of the car, in meters per second?
C. What is the final kinetic energy of the car, in joules?
D. What is the efficiency of the car during the event?
20. Draw conclusions: What appears to be the relationship between friction and efficiency?