A partical of mass `1kg` and carrying `0.01C` is at rest on an inclined plane of angle `30^(@)` with horizontal when an electric field of `(490)/(sqrt(3))NC^(-1)` applied parallel to horizontal .The cofficient of friction is

A partaicle of mass 1 kg and carrying 0.01 C is at rest on an inclined plane of angle of 30^(@) with horizontal when an electric field of (490)/(sqrt(3))NC^(-1) applied parallel to horizontal, the coefficient of friction is

A partaicle of mass 1 kg and carrying 0.01 C is at rest on an inclined plane of angle of 30^(@) with horizontal when an electric field of (490)/(sqrt(3))NC^(-1) applied parallel to horizontal, the coefficient of friction is

A particles of mass 1kg and carrying positive charge 0.01C is sliding down an inclined plane of angle 30^(@) with the horizontal .An electric field E is applied to stop the particles.If the coefficient of friction between the particles and the surface of the plane is (1)/(2sqrt(3)) E must be

A brick of mass 2kg begins to slide down on a plane inclined at an angle of 45^(@) with the horizontal. The force of friction will be

A brick of mass 2kg begins to slide down on a plane inclined at an angle of 45^(@) with the horizontal. The force of friction will be

A block of mass 3 kg is at rest on a rough inclined plane with angle of inclination 30^@ with horizontal. If mu_s = 0.7, then the frictional force is