# A mechanic can exert 113Nm of torque on his wrench. If the mechanic wants to create 2 times more torque with a wrench that is 3 times shorter, how does his force need to change?

##### 1 Answer

Nov 22, 2015

It needs to increase by a factor of 6.

#### Explanation:

Torque is the cross product of the position vector and the force:

This means that if

To double the force he would therefore need to increase