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

4

Step-by-step 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 =
`(120)/(30)` = 4