Meaning of Work in Physics
What is Work in Physics:
Work is defined in physics as the force applied to a body to move it from one point to another. By applying force, potential energy is released and transferred to that body and a resistance is overcome.
For example, lifting a ball off the ground involves doing work as force is applied to an object, it moves from one point to another, and the object undergoes a modification through movement.
Therefore, in physics we can only speak of work when there is a force that, when applied to a body, allows it to move towards the direction of the force.
The working formula is represented as follows:
T = F d cosα
Starting from the formula, work is the product of the force multiplied by the distance and by the cosine of the angle that results between the direction of the force and the direction of the moving object.
However, no work (null work) may be done when lifting or holding an object for a long time without actually moving. For example, when lifting a briefcase horizontally, since the angle formed between the force and the displacement is 90 ° and cos 90 ° = 0.