‘Work’ in science
‘Work’ in science and ‘work’ in everyday life are a little different.
In science, ‘work’ is to apply a force to an object and move it in the direction of force.
In the following cases, It is said that is not the ‘work’.
- If a force is applied to an object and it does not move, the amount of ‘work’ to the object is ‘0’.
- 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 direction of the force applied to the object and the direction of movement are oblique, it is assumed that only part of the applied force is used. (Use triangular function)
Also, if the direction of the force 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’.