Question

Two objects collide and bounce apart. Assuming no outside forces act on the system, which best describes the total momentum after the collision?

It is always greater than it was before the collision.
It is often greater than it was before the collision.
It is always the same as it was before the collision.
It is often the same as it was before the collision.

Answer 1

Answer:

it is always same as it was before the collision (in elastic collision momentum is always conserved