Question

Tikiro places a wrench on a nut and applies a downward force of 32 pounds to tighten the nut. If the center of the nut is at the origin, the force is applied at the point (0.65, 0, 0.3). Find the torque.

Answer 1

Answer: b. 20.8 ft-lb

Answer 2

Explanation:

Assuming "downward" is in the -k direction.

Torque is the cross product of the radius vector and the force vector.

τ = r × F

τ = (0.65 i + 0.3 k) × (-32 k)

τ = 20.8 j