on two occasions during a football game, a defensive player collides with and stops a running back and a fullback. the fullback has more mass than the running back but they were both moving at the same speed prior to collision with the defensive player. during these two different collisions, the defensive player exerts the same force on each player for a prolonged time until the player is stopped. compared to the fullback, the less massive running back will experience momentum change, impulse, and collision time.