Question
A cricket player caught a ball of mass 180 gm moving with a speed of 54 km/hr. If he took 0.08 s to catch the ball, then how much force did the player exert on the ball?
Solution
Given,
Mass of the ball, m = 180gm = 0.18kg
Initial velocity of ball is, u = 54 km/hr = 15 m/s
Final velocity of the ball, v = 0
∴ Impulse of the ball, I = m(u - v)
= 0.18 x 15
= 2.7 Ns
Time of catching the ball, 
Thus,
Force exerted by player on the ball, 
