Question

Mr. D needs to create a lever with a mechanical advantage of 0.4. If he is going to

apply his force 2 meters from the fulcrum, how far away must his load be from the
fulcrum to get the correct mechanical advantage?

Answer 1

The distance of load from fulcrum is 5 m.

Step-by-step explanation:

Given:

Mechanical advantage, MA = 0.4

Distance of force from fulcrum is,
`\textrm{Effort arm}=2\ m`

Distance of load from fulcrum is,
`\textrm{Load Arm}=?`

We know that, Mechanical advantage of a machine is the ratio of the effort arm and load arm.

So, Mechanical advantage is given as:

`MA=\frac{\textrm{Effort Arm}}{\textrm{Load Arm}}\\\\0.4=\frac{2}{\textrm{Load Arm}}\\\\\textrm{Load Arm}=(2)/(0.4)=5\ m`

Therefore, the distance of load from fulcrum is 5 m.