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 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 200 kg rest on a block B of mass 300 kg . A is tied with a horizontal string to a wall. Coefficient of friction between A and B is 0.25 and that between B and floor is 0.2 . The horizontal force F needed to move the block B is

A block A of mass 2 kg is placed over smooth block B of mass 4 kg which is placed over a smooth horizontal floor The coefficient of friction between A and B is 0.4 when a horizontal forces of magnitude 10 N is applied on A the acceleration of block of A and B are

Block A of mass 35 kg is resting on a frictionless floor.

A block of mass 2 kg is at rest on a floor . The coefficient of static friction between block and the floor is 0.54. A horizonatl force of 2.8 N is applied to the block . What should be the frictional force between the block and the floor ? ( take , g = 10 m//s^(2) )

A block A of mass m kg lies on a block B of mass m kg. B in turn lies on smooth horizontal plane. The coefficient of friction between A and B is mu . Both the blocks are initially at rest. A horizontal force F is applied to lower block B at t = 0 till the lower block B undergoes a displacement of magnitude L. Match the statements in Table-1 with the results in Table-2.

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?