Question

A wrench with a length of `54 cm` is being used to unscrew a `6 cm` bolt. If a torque of `90 Nm` is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?

Answer 1

'What is the minimum force that must be applied'

`16 2/3" Newtons"`

Explanation:

Did you know that you can and may treat units of measurement in the same way you do the numbers

Known: `54cm = 0.54m`

Let the unknown applied force be `x` Newtons

`0.54 m xx xN=90 Nm`

Divide both sides by `0.54 m`

`(0.54m)/(0.54m)xx xN=(90xxNxxcancel(m))/(0.54xxcancel(m))`

`color(white)("dd")1color(white)("ddd")xx xN=16 2/3N`