A mass that is significantly larger than another. The larger mass hits the stationary smaller mass. I don't understand why the smaller mass has a velocity of 2 times the larger mass after the collision.
Does it have something to do with v1(initial) - v1(final) = v2(initial) - v2(final)?
Does it have something to do with v1(initial) - v1(final) = v2(initial) - v2(final)?