A block of mass 25 kg is raised by a 50 kg 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 700 N, which mode should the man adopt to lift the block without the floor yielding ?

Explanation

Consider the forces on the man in equilibrium : his weight, force due to the rope and normal force due to the floor. (a) 750 N (b) 250 N, mode (b) should be adopted.