A stone is dropped from a bridge and allowed to free-fall downward.As it falls a certain distance its gravitational potential energy decreases by1000 J.By how much does the stone's kinetic energy increase? (Neglect air resistance).
A)100 J
B)500 J
C)1000 J
D)2000 J

Question

Quizplus · Accepted Answer

In the absence of air resistance, the decrease in gravitational potential energy is equal to the increase in kinetic energy. Therefore, the stone's kinetic energy increases by 1000 J.

A Stone Is Dropped from a Bridge and Allowed to Free-Fall