In a roller coaster, a car has X joules of potential energy when it is resting at the top of the hill. The car moves downhill and reaches the bottom of the hill, where it moves quickly. Assuming no friction, what does the law of conservation of energy predict about the car?

A)At the bottom, the car has X joules of potential energy.
B)At the bottom, the car has X joules of mechanical energy.
C)At the bottom, the car has more than X joules of kinetic energy.
D)At the bottom, the car has more than X joules of mechanical energy.

Question

In a roller coaster, a car has X joules of potential energy when it is resting at the top of the hill. The car moves downhill and reaches the bottom of the hill, where it moves quickly. Assuming no friction, what does the law of conservation of energy predict about the car?


A)At the bottom, the car has X joules of potential energy.
B)At the bottom, the car has X joules of mechanical energy.
C)At the bottom, the car has more than X joules of kinetic energy.
D)At the bottom, the car has more than X joules of mechanical energy.

anonymous · Answer

energy is conserved, if it has X joules at the top of the hill, it has X joules when its at the bottom, it has X joules no matter what (assuming no frictive forces)

anonymous · Answer

@JamesWolf But would it be potential energy or mechanical energy?

anonymous · Answer

mechanical energy sorry logged out

anonymous · Answer

thank you