Question

Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it. Why do they get tired while holding it?

Answer 1

Step1: Force

1. Force is described as an external cause that, when applied, affects or tends to modify the state of the body.
2. if the body is in motion, it will come to rest, and if it is at rest, it will move.
3. It can also induce changes in the body's orientation, shape, size, and other characteristics.
4. Applying force to push or pull a door is an example.

Step2: Analyzing the situation

1. Men apply a force that is opposite and equal to the gravitational force acting on the box in order to keep it in place.
2. While holding the box they apply a muscular force.
3. There is no work being done because there is no displacement because it is held in place without being raised or lowered. Muscle effort is required when applying the force.

Muscle effort is required when applying the force. As a result, men get tired while holding the box.