In a collision, for a brief time there are forces between the colliding objects that are much greater than external forces. Which of the following is true during the collision between the bouncing ball and the floor? The magnitude of the gravitational force exerted by the Earth is much greater than the magnitude of the force exerted by the floor. The magnitude of the force exerted by the floor is much greater than the magnitude of the gravitational force exerted by the Earth. The force exerted by the floor and the gravitational force exerted by the Earth are approximately equal in magnitude. Additional Materials