A body of mass `m` starts from rest down a plane of length `l` at an angle `theta` with the horizontal. (a) find the body's speed at the bottom (b) How far will it slide horizontally on a similar surface after reaching the bottom of the incline. The coefficient of friction between the body and the plane is `mu`.

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

Starting from rest , a body slides down at 45^(@) inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is

Starting from rest , a body slides down at 45^(@) inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is

Starting from rest, a body slides down a 45^(@) inclined plane in twice the time it itakes to slide the same distance in the absence of friction. They the coefficient of friction between the body and the inclined plane is

A block of mass M slides down a rough inclined surface of inclination theta and reaches the bottom at speed at 'v' . However , if it slides down a smooth inclined surface of same length and same inclination , it reaches the bottom with the speed kv. Coefficient of friction between the block and the rough incline is :