# A balanced lever has two weights on it, one with mass 2 kg and one with mass 8 kg. If the first weight is  4 m from the fulcrum, how far is the second weight from the fulcrum?

Dec 15, 2016

The distance is $= 1 m$

#### Explanation:

In a state of equilibrium, the moments about the fulcrum of the weights are equal.

Let $d =$ distance of second weight from the fulcrum

Moment of first weight $= 2 g \cdot 4 N m$

Moment of second weight $= 8 g \cdot d N m$

So,

$2 g \cdot 4 = 8 g \cdot d$

$d = 1 m$