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A hockey ball of mass 200 g travelling at 10 ms–1 is struck, by a hockey stick so as to return it along its original path with a velocity at 5 ms–1. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

 A hockey ball of mass 200 g travelling at 10 ms–1 is struck, by a hockey stick so as to return it along its original path with a velocity at 5 ms–1. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

Grade:12

1 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student

Mass of ball m = 200 g = 0.2 kg
Initial speed of ball u = 10 m/s
Final speed of ball v = – 5 m/s
Initial momentum of the ball = mu
= 0.2 kg x 10 m/s
= 2 kg m/s
Final momentum of the ball = mv
= 0.2 kg x (_ 5 m/s)
= – 1 kg m/s
Hence, change in momentum
= Difference in the momentum
=2 – (–1)
= 2 + 1 = 3kg m/s

Thanks

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