A cricket ball of mass 150g is moving with a velocity of 12m/s and is hit by a bat, so that the ball is turned back with a velocity of 20m/s. The force of the blow acts for 0.01s on the ball. Find the average force exerted by the bat on the ball.
Mass of the ball, m = 150 g = 0.15 kg
Initial speed of the ball, u = -12 m/s
Final speed of the bal after being hit, v = 20 m/s
Impulse = change in momentum = final momentum initial momentum
= Impulse = 0.15 × 20 0.15 × (-12) = 4.8 Ns