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Question

A block of mass m is placed on a rough inclined plane, whose coefficient of static friction is μ, at an angle θ.The angle of inclination is slowly increased. Find out the angle at which the block starts moving.
301862_8cb2af0b7df34439bb2b52dc74cb8556.png

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Solution

0fμsN
mgsinθ>fsmax
mgsinθ>μN
mgsinθ>μcosθ
tanθ>μ
θ=tan1μ
for tan θμ no sliding on inclined plane.
This method is used for finding out the value of μ practically
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