A ball of mass 0.5 kg is dropped from a height of 40 m. The ball hits the ground and rises to a height of 10 m. The impulse imparted to the ball during its collision with the ground is (Take g = 9.8 m/s 2 )

1. A. 84 NS
2. B. 21 NS
3. C. 7 NS
4. D. 0

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