On a smooth horizontal surface a block A of mass 10kg is kept. On this block a second block B of mass 5kg is kept. The coefficient of friction between the two blocks is 0.4 .A horizontal force of 30N is applied on the lower block as shown. The force of friction between the blocks is

A block of mass 2kg is kept on the floor. The coefficient of static friction is 0.4 . If a force F of 2.5N is applied on the block as shown in the figure, the frictional force between the block and the floor will be.

The friction coefficient between the blocks is mu . If force F is applied on the lower block , analyse motion of two blocks.

A block of mass 4 kg is kept on a rough horizontal surface. The coefficient of static friction is 0.8. If a force of 19 N is applied on the block parallel to the floor, then the force of friction between the block and floor is

A block A of mass 2 kg rests on another block B of mass 8 kg which rests on a horizontal floor. The coefficient of friction between A and B is 0.2 while that between B and floor is 0.5. when a horizontal force of 25 N is applied on the block B. the force of friction between A and B is

A block A of mass 2 kg rests on another block B of mass 8 kg which rests on a horizontal floor. The coefficient of friction between A and B is 0.2 while that between B and floor is 0.5 .When a horizontal floor F of 25 N is applied on the block B the force of friction between A and B is

A block of mass 2 kg is placed on the floor (mu=0.4) . A horizontal force of 7 N is applied on the block. The force of friction between the block & floor is f_(s) . Find the f_(s) .

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?

A force of 100 N is applied on a block of mass 3kg as shown below. The coefficient of friction between wall and the block is 1//4 . The friction force acting on the block is :