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A block starts going up a rough inclined...

A block starts going up a rough inclined plane with velocity `V_0` as shown in figure.After some time reaches to starting point again, with a velocity `V_0/2`.Find coefficient of friction `mu` .Given `g=10m/sec^2`.

A

`0.15`

B

`0.35`

C

`0.75`

D

`0.80`

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The correct Answer is:
B
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