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A body of mass 2 kg is allowed to slide ...

A body of mass 2 kg is allowed to slide down along a quadrant of a circle from the horizontal position. In reaching to the bottom, Its velocity is 6m/sec. The work done in overcoming the friction is 10J. The radius of circle is (`g=10 ms^(-2)`)

A

2 mgl

B

4 m

C

1.5 m

D

2.3 m

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The correct Answer is:
D
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