A ball drops some distance and gains 30 J of kinetic energy.Do NOT ignore air resistance.How much gravitational potential energy did the ball lose?
A) more than 30 J
B) exactly 30 J
C) less than 30 J

Question

Quizplus · Accepted Answer

When the ball drops, it loses gravitational potential energy and gains kinetic energy. The gain in kinetic energy is 30 J, but due to air resistance, some of the energy is lost to the surroundings. This means that the loss in gravitational potential energy is more than 30 J. Therefore, the correct choice is A) more than 30 J.

A Ball Drops Some Distance and Gains 30 J of Kinetic