Question

The amount of WORK done is determined by 2 factors.

Describe an example of WORK (using the scientific definition)
List the 2 factors that determine the amount of work done.

Answer 1

Explanation :

Work is done when a force is applied to create a displacement on an object.

Thus, the work done depends on the two factors i.e.

(1) Applied force (F)

(2) Distance or displacement (d)

Mathematically, work done is
`W= F.s`

It also depends on the angle between the force and the displacement.

`W=Fs\ cos\ \theta`

For example,

A person carries a weight of 20 kg and lifts it on his head 1.5 m above the surface. So, the work done by him on the luggage will be:

`W= F* s`

or

`W=m* g * s`

`W=20\ kg* 9.8\ m/s^2* 1.5\ m`

So,
`W=294\ Joules`

Hence, the work done by him on the luggage is 294 Joules.