Question

You use a lever to lift a heavy tree branch. You apply a force of 30 N and the
lever lifts the branch with a force of 120 N. What is the mechanical advantage
of the lever?
A. 4
B. 0.25
C. 2
D. 90

Answer 1

Answer:

4

Explanation:

Given parameters:

Force input  = 30N

Force output  = 120N

Unknown:

Mechanical advantage of the lever  = ?

Solution:

The mechanical advantage is the  quantity that describes how much a simple machine is able to multiply force.

This is expressed as:

        Mechanical advantage  = Force output / Force input

   Mechanical advantage  = $\frac{120}{30}$   = 4