a cricket ball of mass 250gram moving with a velocity of 18mpersec is hit by a bat so that the ball is turned back with a velocity of 30mpersec force of blow acts for 0.01s on ball .find the change in momentum and the average force exerted by the bat in the ball?
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- Given :
=> mass of ball = 250 g = 0.25 kg
=> velocity before hit = (-18)m/s
=> velocity after hit = 30m/s
=> change in time = 0.01s
- To Find :
=> change in momentum (dP) = ?
=> Force (F) = ?
- Formula :
=> dP = m[V2 - V1]
=> F * dt = dP [Newton's second law]
- Calculation :
=> dP = 0.25[30 - (-18)] = 12 kg*m/s
=> F = dP/dt = 12/0.01 = 1200 N
- Answer :
=> dP = 12 kg*m/s
=> F = 1200 N
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