A wooden block is kept on a polished wooden plank whose inclination is increased gradully . The block starts slipping when the plank makes an angle of `25^(@)` with the horizontal . However , once started , the block can continue with unifrom speed , if the inclination is reduced to 21 Calculate coefficient of static and dynamic friction between the block and the plank .

A wooden block is kept on a polished wooden plank and the inclination of the plank is gradually increased. It is found that the block starts slipping when the plank makes an angle of 18^@ with the horizontal. However, once started the block can continue with uniform speed if the inclination is reduced to 15^@ . Find the coefficients of static and kinetic friction between the block and the plank.

A wooden block is kept on a polished wooden plank and the inclination of the plank is gradually increased. It is found that the block starts slipping when the plank makes an angle of 18^@ with the horizontal. However, once started the block can continue with uniform speed if the inclination is reduced to 15^@ . Find the coefficients of static and kinetic friction between the block and the plank.

A wooden block is kept n a polished woden plank and the inclination of the plank is gradually increased. It is found that the block starts slipping when the pland makes an angle of 18^@ with the horizontal. However, once started the block can continue with uniform speed if the inclination is reduced to 15^@ . Find the coefficients of static and kinetic friction between the block and the plank.

A block kept on a rough surface starts sliding when the inclination of the surface is theta with respect to the horizontal . The coefficient of static friction between the block and the surface is

A block is at rest on an inclined plane making an angle alpha with the horizontal. As the angle of the incline is increased the block start slipping when the angle of inclination becomes theta then coefficient of friction is equal to

A block is at rest on an inclined plane making an angle alpha with the horizontal. As the angle of the incline is increased the block start slipping when the angle of inclination becomes theta then coefficient of friction is equal to

A plank with a box on it at one end is gradully raised about the other end. As the angle of inclination with the horizntal reaches 30^(@) , the box starts to slip and slide 4.0m down the plank in 4.0s . The coefficients of static and knitic friction between the box and the plank will be, respectively.

A plank with a box on it at one end is gradully raised about the other end. As the angle of inclination with the horizntal reaches 30^(@) , the box starts to slip and slide 4.0m down the plank in 4.0s . The coefficients of static and knitic friction between the box and the plank will be, respectively.

A plank with a box on it at one end is gradully raised about the other end. As the angle of inclination with the horizntal reaches 30^(@) , the box starts to slip and slide 4.0m down the plank in 4.0s . The coefficients of static and knitic friction between the box and the plank will be, respectively.