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A spherical body of mass 100 g is dropped from a height of 10 m from the ground. After hitting the ground, the body rebounds to a height of 5 m. The impulse of force imparted by the ground to the body is given by: (given, g = 9.8 m/s 2 )

1. 43.2 kg ms –1
2. 23.9 kg ms –1
3. 2.39 kg ms –1
4. 4.32 kg ms –1

Correct answer: 2.39 kg ms –1

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