3
Which of the following does not
contribute to the potential energy of an
object?
A height of the object above the
Earth's surface
B gravitational constant or g of the
Earth
C velocity of the object
D mass of the object

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.