Question

A ball of mass 200 g is moving along a straight line with velocity of 54 km/h. A boy kicked the ball so as to return along its original path with a velocity 18 km/h in 4s. The change in momentum of ball is (a)-4kg.m/s) (c)-7.2 kg. m/s (b) 2 kg. m/s (d) 4000 kg. m/s​

Answer 1

Explanation:

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