Question

Calculate the mechanical advantage of a lever when the effort arm = $12cm$ and the load arm = $30cm$.

Answer 1

Step 1, Given data

Load arm = $30cm$

Effort arm = $12cm$

Step 2, Finding the mechanical advantage

We know,

The mechanical advantage of a lever is given as

$MA=\frac{Effortarm}{Loadarm}$

Putting all the values and solving

we get,

$MA=\frac{12cm}{30cm}=0.4$

Hence the mechanical advantage of the lever is 0.4.