Chapter 10: Q. 60 (page 825)
Turning a bolt with a wrench produces a torque vector that drives the bolt forward. The magnitude of the torque vector is , where r is the vector along the handle of the wrench, F is the force vector applied to the handle of the wrench, and θ is the angle between these two vectors. Therefore, the magnitude of the torque is . In Exercises 60 and 61, find the magnitude of the torque. Express each answer in foot-pounds.
A force of 20 lb is applied to a wrench with a 6-inch handle at an angle of .
Short Answer
The magnitude of the torque is foot-pounds.