Question

A balanced lever has two weights on it, the first with mass `5 kg` and the second with mass `8 kg`. If the first weight is `4 m` from the fulcrum, how far is the second weight from the fulcrum?

Answer 1

`x=2.5m`

Explanation:

First of all remember that the principle of moments must apply which is the anticlockwise moment=clockwise moment.
Now use the formula `F*d=F*d`
but before that convert the masses into weight by multiplying by 10
which is the gravitational force so
`5*10=50N`
`8*10=80N`
no using the formula
`50*4=80*x`
`x=2.5m`