Question

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30 Newtons. What must the input force be?15 N20 N40 N60 N

Answer 1

The correct answer is 15 N.

Explanation:

The mechanical advantage of a machine is calculated as,

M.A = Output Force/ Input Force

Given, mechanical advantage=2

Output force = 30 N

Substituting the values,

$2=\frac{30}{I.F}$

Input force = 15 N

∴ The input force must be 15 N.