A bullet of mass 10 g is fired toward a 30−kg block traveling horizontally toward the bullet. The bullet takes 10 ms to pass through the block as it reverses the block's velocity from 2 m/s to the right to 3 m/s to the left with a constant acceleration. The magnitude of the force that the bullet exerts on the block is A. 30,000 N B. 15,000 N C. 2000 N D. 9000 N E. 3000 N