If the normal force is doubled,then coefficient of friction is

Which of the following is the dimension of coefficient of friction?

A drum of radius R and mass M ,rolls down without slipping along an inclined plane of angle θ.The frictional force

A block of mass 50 kg is placed on a rough inclined plane.The inclination is gradually increased to 30° when the block starts sliding down.Find the magnitude of the limiting friction.

To avoid slipping while walking on ice one should take smallest steps because of the

A block of mass 0.1 kg is held against a wall applying a horizontal force of 5 N on the block. If the co-efficient of friction between the block and the wall is 0.5, the magnitude of the frictional force acting on the block is

A block of mass m is on an inclined plane of angle θ. The coefficient of friction between the block and the plane is μ and tanθ>μ. The block is held stationary by applying a force P parallel to the plane. The direction of force pointing up the plane is taken to be positive. As P is varied from P₁ = mg(sinθ-μcosθ) to P₂ = mg(sinθ+μcosθ), the frictional force f versus P graph will look like

A car turns a corner on a slippery road at a constant speed of 12 m/s. If the coefficient of friction is 0.4, the minimum radius of the arc in metre in which the car turns is

A block is lying static on the floor.The maximum value of static frictional force on the block is 10 N.If a horizontal force of 8 N is applied to the block,what will be the frictional force on the block ?

Friction is the result of