The upper half of an inclined plane of inclination `theta` is perfectly smooth while lower half is rough . A block starting from rest at the top of the plane will again comes to rest at the bottom , if the coefficient of friction between the block and lower hald of the plane is given by

The upper half of an inclined plane with inclination phi is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given by

The upper half of an inclined plane of inclination 45^(@) is perfectly smooth while the lower half is rough. A block starting from rest at the top comes back to rest at the bottom. The coefficient of friction for the lower half is

A block is stationary on an inclined plane If the coefficient of friction between the block and the plane is mu then .

The upper portion of an inclined plane of inclination a is smooth and the lower portion is rough. A partical slide down from rest the top and just comes to rest at the foot . If the ratio of smooth length to rough length is m:n , find the coefficient of friction .

The upper portion of an inclined plane of inclination alpha is smooth and the lower portion is rough. A particle slides down from rest from the top and just comesto rest at the foot.If the ratio ofthe smooth length to rough length is w : find the coefficient of friction.

The upper portion of an incline plane of inclination alpha is smooth and the lower portion is rough. A particle slides down from rest from the top and just comes to rest at the fool. If the ratio of the smooth length to rough length is 2 : 1 and coefficient of frection is n tan alpha , then write the value of n.

A block is at rest on an inclined plane making an angle alpha with the horizontal . As the angle alpha of the incline is increased the block starts slipping when the angle of inclination becomes theta . The coefficient of static friction between the block and the surface of the inclined plane is or A body starts sliding down at an angle theta to the horizontal. Then the coefficient of friction is equal to