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?

1 Answer
Feb 13, 2018

Answer:

The force applied to the wrench must be #>= 150N#

Explanation:

Torque is #\tau=FrSin(\theta)#

The torque value in this problem is similar to static friction. Once it's overcome, the bolt will turn.

#72Nm=F*.48m#, therefore #F =150N#