When a force is applied to an object and the object moves in the direction of the applied force, then work is done on the object. If the force applied is 1 Newton and the object moves 1 meter in the direction of the applied force, then the work done is equal to 1 joule (1 J).

$$ W = F.s .Cos \theta $$

where:

$$W = Work$$

$$F = Force$$

$$s= Displacement$$

$$\theta = Angle between the force and the displacement$$

The joule is the SI unit of work, named after the English physicist James Prescott Joule.

In simple terms, one joule of work is the amount of energy required to move an object a distance of one meter against a force of one newton. It represents the transfer of energy from one system to another, resulting in a change in the object's position, motion, or potential energy.