A body takes time `t` to reach the bottom of a smooth inclined plane of angle `theta` with the horizontal. If the plane is made rough, time taken now is `2t`.The coefficient of friction of the rough surface is

A body takes time t to reach the bottom oa a smooth inclined plane of angle theta with the horizontal. If the plane is made rought, time taken now is 2t .The coefficient of friction of the rough surface is

If the body starts from rest from the top of the rough inclined plane of length 1, time taken to reach the bottom of the plane is

When a body is placed on a rough plane inclined at an angle theta to the horizontal, its acceleration is

A body takes just twice the time as long to slide down a plane inclined at 30^(@) to the horizontal as if the plane were frictionless. The coefficient of friction between the body and the plane is

A block is pushed up a rough inclined plane of 45^(@) .If the time of descent is three times the time of ascent,the coefficient of friction is ?

A smooth inclined plane is inclined at an angle theta with the horizontal. A body starts from rest and slides down the inclined surface. The time taken by the body to reach the bottom is

A body of mass m is launched up on a rough inclined plane making an angle 45^(@) with horizontal If the time of descent between plane and body is

A block is released from top of a smooth inclined plane It reaches the bottom of the plane in sqrt2s The time taken (in second) by the body to cover Ist half of inclined plane is .

An object is placed on the surface of a smooth inclined plane of inclination . It takes time t to reach the bottom of the inclined plane. If the same object is allowed to slide down rough inclined plane of same inclination , it takes time nt to reach the bottom where n is a number greater than 1. The coefficient of friction  is given by -