A ball of mass 0 . 15 kg is dropped from a height 10 m strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is g = 10 m s - 2 nearly :

Question

A ball of mass 0 . 15 kg is dropped from a height 10 m strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is g = 10 m s - 2 nearly :, 0 kg m s - 1, 2 . 1 kg m s - 1, 4 . 2 kg m s - 1, 1 . 4 kg m s - 1

MARKS App · Accepted Answer

m = 0 . 15 kg ; h = 10 m v = 2 g h = 2 × 9 . 8 × 10 = 14 m s - 1 As we know, Impulse = change in momentum = p f - p i = 0 . 15 × 14 - - 0 . 15 × 14 = 2 × 0 . 15 × 14 = 4 . 2 kg m s - 1 ( To raise back to same height, rebounds velocity is same as the hitting velocity)

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