A ball of mass 10 kg moving with velocity 20 m/s collides elastically with wall and rebound with the same speed. Then the magnitude of change in momentum of the ball will be :
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M=10kg
U=20m/s.
Change in momentum = m*u
10*20=200kgm/s
U=20m/s.
Change in momentum = m*u
10*20=200kgm/s
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