First slide
Friction on inclined plane of angle more than angle of repose
Question

An inclined plane has an inclination θ with horizontal. A body of mass m rests on it. If the coefficient of friction between the body is µ, then the minimum force that needs to be applied parallel to the inclined plane is

Moderate
Solution

See fig.

From figure, R=mgcosθ

Now F=μR+mgsinθ

or F=μmgcosθ+mgsinθ.

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