# How do you calculate the mechanical advantage of a second-class lever?

Feb 9, 2016

$\frac{E}{L} = \frac{b}{a}$

#### Explanation:

$\text{Effort-load-fulcrum}$
$\text{a: distance between effort and fulcrum}$
$\text{b:distance between load and fulcrum}$
$\text{E:Effort}$
$\text{L:Load}$
$E \cdot a = L \cdot b$
$\frac{E}{L} = \frac{b}{a}$