A ball is projected into the air with 900 J of kinetic energy that is transformed to potential energy at the top of its trajectory.When it returns to its original level after encountering air resistance,its kinetic energy is

Question

Quizplus · Accepted Answer

When the ball reaches the top of its trajectory, all its kinetic energy has transformed into potential energy. However, when it returns to its original level, it encounters air resistance which will dissipate some of its energy as heat. Therefore, its kinetic energy will be less than 900 J.

A Ball Is Projected into the Air with 900 J