A wrench with a length of #12 cm# is being used to unscrew a #3 cm# bolt. If a torque of #5 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
Mar 13, 2018

Answer:

The torque required to unscrew is 5Nm but the force on the wrench is 37.03N

Explanation:

Torque is always to the center of the rotated object.

Assuming you mean bolt diameter is 3cm, so radius is1.5cm

The torque which holds it is 5Nm which is 500N-cm

So #500/(12 +1.5)# is the force required to unscrew the bolt.

That equals : #37.03N#