Question

A machine uses a force of 200 newtons to do 20,000 joules of work in 20 seconds. Find the distance the object moved and the power of the machine.

Answer 1

The answers are: `s=100m` and `P=1000W`.

To answer to the questions these formulae are needed:

`L=vecF*vecs`: where the `*` is the scalar product;

and:

`P=L/t`

So:

`s=L/F=(20000J)/(200N)=100m`

(I supposed that the angle between `F and S` is 0);

and:

`P=(20000J)/(20s)=1000W`.