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 gradually raised about the other end. As the angle of invlination with the horizontal reaches 30^@ , the box starts to slip and slides 4.0 m down the plank in 4.0s.The coefficients of static and kinetic friction between the box and the plank will be, respectively: .

A plank w ith a box on it atone end is gradually raised about the other end . As the ang le of in clin ation with the horizontal reaches 30^(@) , the box starts to slip and slides 4.0 m down the plan k in 4.0s. The coefficients of static and k inetic friction between the box and the plank will be, respectively:

A student wants to determine the coefficients of static frction and kinetic friciton between a box and a plank. She places the box on the plank and gradually raises on end on of the plank. When the angle of inclination with horizontal reaches 30^(@) , the box stars to slip, and it then slides 2.5m dwon the plank in 4.0 s at constant acceleration. What are (a) the coefficient of static frictio and (b) the coefficient of kinetic friction between the box and the plank ?

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.

Determine the maximum horizontal force F that may be applied to the plank of mass m for which the solid sphere does not slip as it begins to roll on the plank. The sphere has a mass M and radius R. The coefficient of static and kinetic friction between the sphere and the plank are mu_(s) and mu_( k) respectively.

Determine the maximum horizontal force F that may be applied to the plank of mass m for which the solid sphere does not slip as it begins to roll on the plank. The sphere has a mass M and radius R . The coefficient of static and kinetic friction between the sphere and the plank are mu_(S) and mu_(k) respectively.