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Momentum

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Question

A disk of mass 1 kg is kept floating horizontally in air by firing bullet of mass 0.5 kg each vertically at it, at the rate of 10 per second. If the bullets rebounded with the same speed, the speed with which these are fired will be then

A

0.098 m/s

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B

0.98 m/s

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C

9.8 m/s

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D

98.0 m/s

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Solution

The correct option is D 98.0 m/s

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