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

Answer:

The effort force is 37.5 N.

Step-by-step 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 :

$m=\dfrac{\text{effort distance}}{\text{resistance distance}}=\dfrac{\text{resistance force}}{\text{effort force}}$

Let F is effort force.

$\dfrac{8}{1.5}=\dfrac{200}{F}\\\\F=\dfrac{200\times 1.5}{8}\\\\F=37.5\ N$

So, effort force is 37.5 N.