A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational 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, it has now transformed all of its kinetic energy into gravitational potential energy. However, due to air resistance, the ball loses some of its energy as it descends back to its original level. Therefore, the kinetic energy of the ball when it reaches its original level will be less than 100 J.

A Ball Is Projected into the Air with 100 J