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A box of mass 4kg rests upon an inclined...

A box of mass `4kg` rests upon an inclined plane This inclination is gradually incresed till the box starts sliding down the plane. At this stage slope of the plane is 1 in 3 Find coefficient of friction between the box and the plane What force applied to the box parallel to the plane will just make the box move up the plane ?

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SL ARORA-LAWS OF MOTION : FRICTION-Self Practice
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