Read the description of the motion and decide if the kinetic energy (KE) and the gravitational potential energy (PE) is increasing, decreasing, or remaining constant.

The hot air balloon slowly descended at a constant speed until it finally landed on the ground.

Question options:

a. KE remains constant and PE remains constant.


b. KE remains constant and PE decreases.


c. KE decreases and PE remains constant.


d. KE decreases and PE decreases.