Consider the system of 3 blocks,upon which an external force F is applied.The force experienced by Block C is :

A block of mass m is placed on a rough horizontal surface. The coefficent of friction between them is mu . An external horizontal force is applied to the block and its magnitude is gradually increased. The force exerted by the block on the surface is R.

A block is placed on a rough floor and a horizontal force F is applied on it.The force of friction f by the bloor on the block is measured for different values of F and a graph is plotted between them.

Two blocks of mass m = 1 kg and M = 2 kg are in contact on a frictionless table. A horizontal force F(= 3N) is applied to m. The force of contact between the blocks, will be-

A small block of mass 20kg rests on a bigger block of mass 30kg , which lies on a smooth horizontal plane. Initially the whole system is at rest. The coefficient of friction between the blocks is 0.5 . The horizontal force F=50N is applied on the lower block. a. Find the work done by fricitonal force on upper block and on the lower block in t=2s . b. Is the magnitude of work done by the frictional force on upper and lower blocks same? c. Is the work done by the frictional force on the upper block converted to heat or mechanical energy or both?

Two blocks A and B are lying on the table as shown in the figure. The coefficient of friciton between block A and block B is mu . The coefficient of friction between block B and ground also mu . An external force F is applied in the direction shown. The maximum value of the force F that can be applied without moving the blocks.

A block of mass m is placed on a horizontal surface. The coefficient of frication between them is mu . The block has to be moved by applying a single external force on it. The force may be applied in my direciton. The minimum value of this force must be

A block of unknown mass is at rest on a rough, horizontal surface. A horizontal force F is applied to the block. The graph in the figure shows the acceleration of the block with respect to the applied force. The mass of the block is

Blocks are in contact on a frictionless table. A horizontal force F=3N is applied to one block as shown. The force exerted by the smaller block m_(2) on block m_(1) is :

Blocks are in contact on a frictionless table. A horizontal force F = 3N is applied to one block as shown. The force exerted by the smaller block m_(2) on block m_(1) is-

A force F is applied on a block kept at the smooth surface in contact with the wall. If the block is at rest, the forces applied by block on surface (1) is F_(1) and on surface (2) is F_(2) . Find (F_(1))/(F_(2)) (Take g=10 m//s^(2))