A block of mass 25 kg is raised by a 50kg man in two different ways as shown in fig. what is the action on the floor by the man in the two cases? If the floor yields to a normal force of `700N`, which mode should the man adopt to lift the block without the floor yielding?

In fig. the block of mass M is at rest on the floor . At what acceleration with which should a boy of mass m climb along the rope of negligible mass so as to lift the block from the floor?

Two block of masses 2kg and 4kg are released from rest over a smooth inclined place of inclination 30^(@) as shown in figure what is the normal force between the two blocks?

A block of mass sqrt(3) kg rests on a horizontal frictionless surface. What will be the acceleration of the block if it is subjected to two forces as shown in the figure.

A man of mass 90 kg is standing in a lift whose cable broke suddenly. If thelift falls freely, the force exerted by the floor on the man is

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 wooden block of mass 2 kg rests on a soft horizontal floor . When aniron cylinder of mass 25 kg is placed on top of the block , the floor yields steadily , and the block and the cylinder go down with an acceleration of 0.1 ms^(-2) What is the action of the block on the floor (a) before and (b) after the floor yields ? Take g = 10 ms^(-2) . Identify the action reaction pairs in the problem .