Question

When a ball rolls down the hill, what energy is conserved?

A. Potential energy to chemical energy.
B. Potential energy to kinetic energy.
C. Chemical energy to kinetic energy.
D. Kinetic energy to potential energy.

Answer 1

Potential energy is the stored energy of position.

The position of the ball on the hill is high, so it starts at potential energy.

Kinetic energy is the energy of movement.

Since the ball is moving down the hill,
Your answer is B.

Hope this helps!

Answer 2

The correct option is B.
Potential energy is defined as the energy store in an object as a result of its position or state, while the kinetic energy is defined as the energy possess by an object in motion.
In the question given above, the ball possesses potential energy as a result of its high position on the hill. When the ball started rolling down the hill, its potential energy is converted to kinetic energy, which is energy in motion.