Question

what is the best description of one billiard ball hitting a second billiard ball? (1 point)
potential energy is transferred from the first ball to the second ball.
kinetic energy in the second ball is transferred to the first ball.
all of the kinetic energy in the first ball is transferred to the second ball.
most of the kinetic energy in the first ball is transferred to the second ball.

Explanation:

When one billiard ball hits another, it is a collision. In such collisions, kinetic energy (energy of motion) is involved. The first ball is moving (has kinetic energy) and hits the second ball.

• Potential energy is energy due to position. Since the balls are on a flat surface (assuming standard billiards) and there's no height - change relevant to the collision, potential energy transfer is not the case. So the first option is wrong.
• The second ball is initially at rest (assuming a standard setup where one ball is moving and hits a stationary one). So it can't transfer kinetic energy to the first ball. The second option is wrong.
• In real - world billiard ball collisions (which are not perfectly elastic), some energy is lost (e.g., due to friction, sound, heat). So not all kinetic energy is transferred. The third option is wrong.
• In billiard ball collisions (which are close to elastic but not perfectly so), most of the kinetic energy of the first ball is transferred to the second ball.

Answer:

Most of the kinetic energy in the first ball is transferred to the second ball.