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A block of mass m kg is pushed up against a wall by a force P that makes an angle 'theta' with the horizontal as shown in figure. The coefficient of static friction between the block and the wall is mu. The minimum value of P that allows the block to remain stationary is |
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Answer» <P> Solution :`P sin THETA + F=mg``f=(mg-P sin theta)` `MU N =(mg-P sin theta)` `mu P COS theta = mg-P sin theta` `P[sin theta+mu cos theta]=mg` `P=(mg)/((sin theta + mu cos theta))` 
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