Calc III torque question?

A torque wrench grips a bolt at the origin of coordinates, with the free end of the torque wrench located at the point (r_0, 0, 0).The force on this end of the torque wrench points in the direction of V = <10, 0, 16>. Note that r = <r0, 0, 0> in this problem. Compute the length of the lever arm L... show more A torque wrench grips a bolt at the origin of coordinates, with the free end of the torque wrench located at the point (r_0, 0, 0).The force on this end of the torque wrench points in the direction of V = <10, 0, 16>.
Note that r = <r0, 0, 0> in this problem. Compute the length of the lever arm L needed to produce a torque with magnitude 240 ft-lb if the magnitude of the force is 120 pounds.
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