A ball lies stationary on the ground. A boy strikes the ball with his boot. The boy’s boot remains in contact with the ball for 0.040 s. The average force acting on the ball is 200 N. The ball leaves the boy’s boot at a speed of $20\,\text{m s}^{-1}$. Which row states the impulse exerted by the boot on the ball and the average acceleration of the ball over the 0.040 s?
- Aimpulse on ball: 8 Ns; average acceleration of ball: $0.8\,\text{m s}^{-2}$
- Bimpulse on ball: 8 Ns; average acceleration of ball: $500\,\text{m s}^{-2}$
- Cimpulse on ball: 5000 Ns; average acceleration of ball: $0.8\,\text{m s}^{-2}$
- Dimpulse on ball: 5000 Ns; average acceleration of ball: $500\,\text{m s}^{-2}$