A body falls through the atmosphere (consider air resistance)gaining 20 J of kinetic energy.How much gravitational potential energy did it lose?
A)20 J
B)more than 20 J
C)less than 20 J
D)It is impossible to tell without knowing the mass of the body.
E)It is impossible to tell without knowing how far the body falls.

Question

Quizplus · Accepted Answer

When a body falls through the atmosphere with air resistance, the gravitational potential energy lost is converted into kinetic energy and work done against air resistance. Since the body gains 20 J of kinetic energy, it must have lost more than 20 J of gravitational potential energy to also overcome the air resistance.

A Body Falls Through the Atmosphere (Consider Air Resistance)gaining 20