A lever has an effort arm of 10 inches and a resistance arm of 2 inches. What effort will lift a 200 pound load?

Correct answer to question 66 (Mechanical Comprehension): 40 pounds

Method

The mechanical advantage is 10 / 2 = 5, so the effort is 200 / 5 = 40 pounds. Your hand must travel five inches for every inch the load rises.