When two objects collide, how do you determine which object experiences the greater change in momentum? for instance, if A and B with different masses travelling at different speeds collide, do they experience the same momentum change after the collision? What about KE? This is my reasoning so far: The change in momentum does not change, because the same force acts on both A and B for the same amount of time during the collision. However, the kinetic change because the masses of the objects are different even though the change in velocities are the same. Is this correct?