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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?
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?
CBSE | Class 11 | Laws of Motion | NCERT | Physics
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?

The block’s mass is 25 kg.

The man’s weight is 50 kg.

Gravitational acceleration = 10 m/s2

F = 25 x 10 = 250 N is the block’s weight.

W = 50 x 10 = 500 N is the man’s weight.

In the first example, the guy raises the block by providing a 250 N upward force (same as the weight of the block)

There will be a downward response on the floor, according to Newton’s third law of motion. The man’s actions on the floor.

= 750 N = 500 N + 250 N

The individual in the second example exerts a downward force of 25 kg wt. The response is in the upward direction, according to Newton’s third law of motion.

The man’s behaviour on the floor in this case

= 500 N – 250 N

As a result, man must adopt the 2 method.

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