How does the gravitational potential energy of the riders compare between point A and point B?
point a. 20m
point b. 5m
A.The gravitational potential energy at point A cannot be compared to the gravitational energy at point B.
B. The gravitational potential energy at point A is 15 times as large as that at point B.
C. The gravitational potential energy at point A is equal to that at point B.
D. The gravitational potential energy at point A is four times as large as that at point B.