Question

A lever and fulcrum are used to lift a fallen tree, which has a weight of 480N. if the lever has a mechanical advantage of 5.5, what is the input force that will begin lifting the tree of the ground

Answer 1

The input force is 87.27N

Step-by-step explanation:

Mechanical advantage (M.A)of a machine is the ratio of load to effort

Given

M.A= 5.5

load= 480N

effort= ?

Applying the formula and substituting to find the effort we have

`M.A= (load)/(effort)`

`5.5= (480)/(effort)\\\effort= (480)/(5.5) \\\effort= 87.27N`