Question

a comparison of kinetic and potential energy is shown here with the position and motion of a round object with regards to a hill. which statements support the claim that an energy transfer is occurring as the ball rolls down the hill? select all that apply. a the ball transfers energy to the air in the form of sound b the ball generates a gravitational field as it rolls downward. c the potential energy is converted to kinetic energy as the ball rolls down the hill d the kinetic energy is converted to potential energy as the ball rolls down the hill e the ball loses kinetic energy but generates thermal energy as it moves down the hill

Explanation:

• Option A: Sound is a form of energy transfer from the ball to the air as it rolls, so this supports energy - transfer claim.
• Option B: A ball rolling down a hill does not generate a gravitational field in the context of energy - transfer for this problem; the Earth's gravitational field acts on the ball.
• Option C: As the ball rolls down the hill, its height decreases (losing potential energy) and its speed increases (gaining kinetic energy), so potential energy is converted to kinetic energy, supporting the claim.
• Option D: As the ball rolls down the hill, it is the potential energy that is converted to kinetic energy, not the other way around.
• Option E: As the ball moves down the hill, it gains kinetic energy and also generates thermal energy due to friction, not loses kinetic energy in the sense of overall energy - transfer related to the motion down the hill.

Answer:

A. The ball transfers energy to the air in the form of sound
C. The potential energy is converted to kinetic energy as the ball rolls down the hill