Question: A bolt requires a torque of magnitude 50 ft-lbs to be loosened. The wrench to be used is of variable length and grips the bolt in such a way that it makes an angle of 60Ac-¦ with the horizontal. A mechanic is to apply 40 lbs of force in the horizontal direction at the end of the wrench (towards the bolt) to loosen the bolt. What minimum length of the wrench is required?