Which of the following are examples of kinetic energy changing into potential energy? (A) A pine tree branch is not moved by the wind. (B) A television is turned on. (C) A boy climbs to the top of a slide and sits down. (D) A baseball sitting on a stand.

To determine which of the options represent kinetic energy changing into potential energy, we need to understand the definitions of kinetic and potential energy: - **Kinetic Energy (KE)** is the energy of an object in motion. - **Potential Energy (PE)** is the energy stored in an object due to its position or state. Now, let's analyze each option: (A) **A pine tree branch is not moved by the wind.** - The branch is stationary, meaning there is no kinetic energy involved. Therefore, this does not represent a change from kinetic to potential energy. (B) **A television is turned on.** - This involves electrical energy being converted into light and sound energy, not a change between kinetic and potential energy. (C) **A boy climbs to the top of a slide and sits down.** - As the boy climbs, he is moving (kinetic energy) and gaining height (potential energy). When he reaches the top, the kinetic energy he had while climbing is converted into potential energy due to his elevated position. This is an example of kinetic energy changing into potential energy. (D) **A baseball sitting on a stand.** - The baseball is at rest, so it has no kinetic energy. It has potential energy due to its position, but there is no conversion from kinetic to potential energy. Based on this analysis, the only option that represents kinetic energy changing into potential energy is: **(C) A boy climbs to the top of a slide and sits down.**