In the diagram the wall and the interfac...

In the diagram the wall and the interface between blocks B and C are smooth. The value of F required to keep the whole system stationary is `:`

100N

80N

90N

none of these

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Impending state of mation is a critical border line between static and dynamic states of a body A block of mass m is supported on a rough vertical wall by applying a rough vertical wall by appying a force F as shwon in figure coefficent of static fricition between block and wall is mu The block under the influenace F sin theta may have a tendency to move upwart or it may be assumed that F sin theta justprevents downward fall of th block read the above prevents downward fall of the block .Read the above passage carefully and answer the following quesstions. The minimum value of force F required to keep the block stationary is

The situation shown in the figure, all surfaces are smooth. The mass of sphere is 7 kg if the force F required to keep the system in equilibrium is 9 n N. Then find the value of n.

In the shown figure the minimum value of F required to move the block A away from the wall is :

Impending state of mation is a critical border line between static and dynamic states of a body A block of mass m is supported on a rough vertical wall by applying a rough vertical wall by appying a force F as shwon in figure coefficent of static fricition between block and wall is mu The block under the influenace F sin theta may have a tendency to move upwart or it may be assumed that F sin theta justprevents downward fall of th block read the above prevents downward fall of the block .Read the above passage carefully and answer the following quesstions. if F is the force applied on the block as shown and F_("min") is the minimum value of force requird to keep the block stationary . then choose the correct alternative.

A block of mass m kg is pushed up against a wall by a force P That makes an angle 'theta' with the horizontal as shown in The coefficient of static friction between the block and the wall is mu The minimum value of P that allows the block to remain stationary is .

In the arrangement shown in the figure, mass of the block B and A is 2m and m respectively. Surface between B and floor is smooth. The block B is connected to the block C by means of a string-pulley system. If the whole system is released, then find the minimum value of mass of block C so that A remains stationary w.e.t. B. Coefficient of friction between A and B is mu.

Block B lying on a table weighs w. The coefficient of static friction between the block and the table is mu. Assume that the cord between B and the knot is horizontal. The maximum weight of the block A for which the system will be stationary is

In the adjoining figure, the coefficient of friction between wedge (of mass M ) and block (of mass m ) is mu . Find the minimum horizontal force F required to keep the block stationary with respect to wedge.

A block A has been placed symmetrically over two identical blocks B and C. All the three blocks have equal mass, M each, and the horizontal surface on which B and C are placed is smooth. The coefficient of friction between A and either of B and C is mu . The block A exerts equal pressure on B and C. A horizontal force F is applied to the block B. (a) Find maximum value of F so that A does not slip on B or C and the three blocks move together. (b) If F is increased beyond the maximum found in (a) where will we see slipping first- at contact of A and B or at the contact of A and C. (c) If F is kept half the maximum found in (a), calculate the ratio of friction force between A and B to that between A and C. Does this ratio change if F is decreased further?

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