A skydiver jumps out of a plane and begins to accelerate. His speed increases to 20 m/s then 30 m/s . His acceleration slows until he reaches a constant speed of 50 m/s which statement correctly describes his kinetic energy during this time.

Answer 1

The correct statement is that his kinetic energy increases from 0 to a maximum value and then remains constant at that maximum value.

As the skydiver jumps out of the plane, his speed initially increases from 0 to 20 m/s, which means his kinetic energy is increasing. Then, his speed further increases to 30 m/s, resulting in a higher kinetic energy. However, once he reaches a constant speed of 50 m/s, his kinetic energy remains constant at this maximum value since kinetic energy is directly proportional to the square of the velocity.