Question

A balanced lever has two weights on it, the first with mass `15 kg` and the second with mass `45 kg`. If the first weight is `12 m` from the fulcrum, how far is the second weight from the fulcrum?

Answer 1

`x=4 meters`

Explanation:

`color(blue)(G_1*AC)=color(red)(G_2*BC)`
`color(blue)(cancel(15)*cancel(9,81)*12)=color(red)(cancel(45)*cancel(9,81)*x)`
`color(blue)(12)=color(red)(3*x)`
`x=12/3`
`x=4 meters`