How does the kinetic energy of the two-block system after the collision compare with its kinetic energy before the collision, and why?

Question

asked Jan 16, 2023 90.8k views

1 Answer

Mike Tommasi · Answer 1 · 2023-01-19T16:21:13+0000

It is less, because the blocks have velocities in opposite directions before the collision, so some of their kinetic energy cancels.