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.

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!

An egg, or a sack of flour