In the figure shown a ring of mass M and a block of mass m are in equilibrium. The string is light and pulley P does not offer any friction and coefficient of friction between pole and M is `mu.` The frictional force offered by the pole of M is

A block of mass m=2kg is placed in equilibrium on a moving plank accelerating with a=4m//s^(2) . If coefficient of friction between plank and block mu=0.2 . The friction force acting on theblock is:

A block of mass m=2kg is placed in equilibrium on a moving plank accelerating with a=1m//s^(2) . If coefficient of friction between plank and block mu=0.2 . The friction force acting on theblock is:

A wedge of mass 2m and a cube of mass m are shown in figure. Between cube and wedge, there is no friction. The minimum coefficient of friction between wedge and ground so that wedge does not move is

A block of mass m is stationary on a horizontal surface. It is connected with a string which has no tension. The coefficient of friction between the block and surface is m . Then , the frictional force between the block and surface is:

In figure find the acceleration of m assuming that there is friction between m and M and all other surfaces are smooth and pulleys light and mu = coefficient of friction between m and M

Figure-2.84 shows a man ofmass M standing on a board of mass m.What minimum force is required to exert on string to slide the board. The friction coefficient between board and floor is mu and there is sufficient friction between man and board so that man does not slip. [(mu(M+m)g)/(1+mu)]

Shown in the diagram is a system of two bodies, a block of mas m and a disc of mass M , held in equilibrium. If the string 3 is burnt, find the acceleration of the disc. Neglect the masses of the pulleys P and Q . (The coefficient of friction between the block and horizontal surface is mu )

Shown in the diagram is a system of two bodies, a block of mas m and a disc of mass M , held in equilibrium. If the string 3 is burnt, find the acceleration of the disc. Neglect the masses of the pulleys P and Q . (The coefficient of friction between the block and horizontal surface is mu )