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 gains kinetic energy from the 0.10-kg object. By calculating the final velocities using conservation of momentum and kinetic energy, it can be shown that the 0.15-kg object gains 96% of the original kinetic energy of the 0.10-kg object.

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