A 0.10-kg object moving initially with a velocity of +0.20 m/s makes an elastic head-on collision with a 0.15-kg object initially at rest. What percentage of the original kinetic energy is gained by the 0.15-kg object?
A) "4%"
B) "-4%"
C) "50%"
D) "96%"

Question

Quizplus · Accepted Answer

In an elastic collision, kinetic energy is conserved. The 0.15-kg object initially at rest will gain kinetic energy equal to the kinetic energy lost by the 0.10-kg object. Since the 0.15-kg object starts with zero kinetic energy, it gains 100% of the kinetic energy transferred to it, which is 96% of the original kinetic energy of the system.

A 010-Kg Object Moving Initially with a Velocity of +0