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?
First of all remember that the principle of moments must apply which is the anticlockwise moment=clockwise moment.
Now use the formula
but before that convert the masses into weight by multiplying by 10
which is the gravitational force so
no using the formula