A block resting on an inclined plane begins to slide down the plane. If the angle of inclination is gradually increased to 30 degrees, then the coefficient of friction between the block and the plane is-

A block resting on an inclined plane begins to slide down the plane. I

1.	A block resting on an inclined plane begins to slide down the plane. If the angle of inclination is gradually increased to 30 degrees, then the coefficient of friction between the block and the plane is-
A.	0.5
B.	0.577
C.	0.72
D.	0.866
Answer» C. 0.72

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A block resting on an inclined plane begins to slide down the plane. If the angle of inclination is gradually increased to 30 degrees, then the coefficient of friction between the block and the plane is-

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