‘Work’ in science

‘Work’ in science

‘Work’ in science and ‘work’ in everyday life is a little different.
In science, ‘work’ is to apply a force to an object and move it in the force’s direction.

In the following cases, It is said that it is not the ‘work.’

1. If a force is applied to an object and it does not move, the amount of ‘work’ to the object is ‘0’.
2. If the force exerted on a moving object is ‘0’ or the forces exerted on the object are in equilibrium with each other, the amount of work to the object is ‘0’.

If the force’s direction is applied to the object and the direction of movement is oblique, it is assumed that only part of the applied force is used. (Use triangular function)

If the force’s direction applied to the object and the direction of movement were perpendicular to each other, this force did not move the object. So the amount of ‘work’ by this force is ‘0’.