Question

A lever has an effort arm that is 8 meters long and the resistance (load) arm that is

1.5 meters long, how much effort is needed to lift a 200 Newton weight?

Answer 1

The effort force is 37.5 N.

Explanation:

We have,

Length of the effort arm is 8

Length of the resistance or load arm is 1.5 m

It is required to find how much effort is needed to lift a 200 Newton weight. The definition of mechanical advantage is :

`m=\frac{\text{effort distance}}{\text{resistance distance}}=\frac{\text{resistance force}}{\text{effort force}}`

Let F is effort force.

`(8)/(1.5)=(200)/(F)\\\\F=(200* 1.5)/(8)\\\\F=37.5\ N`

So, effort force is 37.5 N.