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The force F(1) required to just moving a...

The force `F_(1)` required to just moving a body up an inclined plane is double the force `F_(2)` required to just prevent the body from sliding down the plane. The coefficient of friction is `mu`. The inclination `theta` of the plane is :

A

`tan ^(-1) mu`

B

`tan^(-1) mu/2`

C

`tan^(-1)2mu`

D

`tan^(-1) 3mu`

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The correct Answer is:
d
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