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Instantaneous Force and Impulse

A block lying...

Question

A block lying on an inclined plane has a weight of 50 N. It just being to slide down when inclination of plane with the horizontal is $30^{0}$ . Find the coefficient of static friction.

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Solution

The block reaches the point of sliding when the plane makes an angle of $30^{0}$ with the horizontal. Hence, $30^{o}$ is the angle of response; so $μ_{s} = t a n 30^{0} = 1 / \sqrt{3}$ .

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