# A wrench with a length of 48 cm is being used to unscrew a 6 cm bolt. If a torque of 72 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?

The force applied to the wrench must be $\ge 150 N$
Torque is $\setminus \tau = F r S \in \left(\setminus \theta\right)$
$72 N m = F \cdot .48 m$, therefore $F = 150 N$