If a 40 lb generator applies +1400 inch-pounds to the reference axis, the generator is located at:

If a 40 lb generator applies +1400 inch-pounds to the reference axis, the generator is located at:

• A. +35 inches
• B. +1400 inches
• C. +40 inches
• D. +2020 inches

Answer: (A)

Torque about the reference axis equals the product of force and distance from the axis. With a 40 lb force and a torque of +1400 inch-pounds, the distance is r = 1400 / 40 = 35 inches. The plus sign indicates the direction defined in the problem, so the generator is located 35 inches from the axis on the positive side. This makes sense because 40 inches would produce 1600 in-lb, not 1400; 1400 inches would require 1 lb, and 2020 inches would require about 50.5 lb.

Torque about the reference axis equals the product of force and distance from the axis. With a 40 lb force and a torque of +1400 inch-pounds, the distance is r = 1400 / 40 = 35 inches. The plus sign indicates the direction defined in the problem, so the generator is located 35 inches from the axis on the positive side. This makes sense because 40 inches would produce 1600 in-lb, not 1400; 1400 inches would require 1 lb, and 2020 inches would require about 50.5 lb.