Blocks A and B are moving toward each other along the x axis. A has a mass of 2.0 kg and a velocity of 50 m/s, while B has a mass of 4.0 kg and a velocity of -25 m/s. They suffer an elastic collision and move off along the x axis. The kinetic energy transferred from A to B during the collision is:
A) 0
B) 2500 J
C) 5000 J
D) 7500 J
E) 10000 J

Question

Quizplus · Accepted Answer

In an elastic collision, kinetic energy is conserved, meaning the total kinetic energy before and after the collision remains the same. However, the kinetic energy transferred from one object to another can be zero if the velocities are such that the relative speed of separation equals the relative speed of approach.

Blocks a and B Are Moving Toward Each Other Along