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Question

A particle of mass m falling from height h reaches the ground with velocity 0.8gh. Work done by friction force on the particle is

h ऊँचाई से गिरता हुआ m द्रव्यमान का एक कण धरातल पर वेग 0.8gh से पहुँचता है। कण पर घर्षण बल द्वारा किया गया कार्य है

A
–0.2mgh
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B
–0.4mgh
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C
–0.8mgh
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D
–0.6mgh
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Solution

The correct option is D –0.6mgh

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