A student argues that a 1.0-kg rock that falls from a height of 100.0 m to a height of 90.0 m has a gravitational potential energy of 98 J, since the rock's height changed by 10.0 m. What error did the student make? A.
The gravitational potential energy of an object remains constant because the object is in a closed system.
B.
The gravitational potential energy of an object is computed by multiplying 1/2 by the mass times the square of the velocity.
C.
The gravitational potential energy of an object depends on the object's height and not on the change in height.
D.
The student did not make an error.