Question

a ball rolls along a flat surface, then begins rolling up an inclined plane. what best describes how the kinetic and potential energy are affected as the ball goes up the incline? (1 point)
kinetic energy increases and potential energy decreases.
kinetic energy increases and potential energy increases.
kinetic energy decreases and potential energy increases.
kinetic energy decreases and potential energy decreases.

Explanation:

• Kinetic energy ($KE=\frac{1}{2}mv^{2}$) depends on the speed of the ball. As the ball rolls up the incline, it slows down due to the component of gravitational force acting against its motion. So, the kinetic energy decreases.
• Potential energy ($PE = mgh$) depends on the height ($h$) of the object above a reference level. As the ball moves up the incline, its height $h$ increases. So, the potential energy increases.

Answer:

Kinetic energy decreases and potential energy increases.