Question

If two objects collide, each object exerts a force on the other that is equal in size, but in the opposite direction. If those two objects have different masses what object will have a greater change in velocity?

Answer 1

The answer is it must be the same, and the reason is Newton's 3rd law. Any two objects that are exerting forces on each other form a reaction pair, so have force some that are equal in magnitude (same size) but opposite in direction. Was it helpful?