In loading a lorry, a man lifts boxes each of weight 100n through a height of 1.5m.
how much work does he do in lifting one box?
work done =

The amount of work done in order to lift the box is

Explanation:

Given the weight of each box is

And the man lifts boxes at a height of

We need to find the amount of work done.

The amount of work done is the product of applied force that causes the displacement .

In our problem force is and displacement is  .

Now, work done

So, the amount of work done in order to lift the box is

the independent variable, or the one that is intentionally manipulated is the speed.

d) physical means can be used to separate the components of air.