Work Definition

Let assume a constant force F applies on a box in a certain direction. The box has displaced by a distance d in the same direction as in force, then work done W by force is defined as

Work done = Force x Displacement

W = F d  …(i)

In the above figure, 2 (i) states the initial position of the box whereas (ii) later position of the box.

Thus, Work done by the force is equal to the multiplication of magnitude of the force and distance moved by the box in the direction of the force.

Work is a scalar quantity, which means work has no direction. It has only magnitude.

In equation (i), If F = 1N and d = 1m then the work done by the force is 1 Nm or 1 Joule. Joule is the SI (System of International) unit of work.

Thus, 1 Joule amount of work defined as when 1 Newton force causes a 1-meter displacement in the direction of the force.

In daily life, you are doing activities like study, running speaking, hear, climbing, gossips with friends and a lot of other things. Do you know? All these activities require some energy, and you get it from your daily food.

In our day-to-day life, everyone eats food, gets energy, and does some activity which is called work. Any physical or mental activity labor consider as work in our daily life. What will be considered as work or not, it depends on how we define work. “Playing card” could be considered as work for someone and couldn’t be for another one. But in science, work has a certain definition and some conditions.