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

1. A. 4.2 kg m/s
2. B. 2.1 kg m/s
3. C. 1.4 kg m/s
4. D. 0 kg m/s

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