NEET 2021 Physics Impulse and Momentum MCQ 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/s²) nearly:
0 kg m/s
4.2 kg m/s
2.1 kg m/s
1.4 kg m/s
Correct Answer
Detailed Explanation
The impulse is the change in momentum. The velocity just before impact and just after rebound is the same in magnitude but opposite in direction. Thus, impulse = 2mv = 2 * 0.15 * √(2 * 10 * 10) = 4.2 kg m/s.
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