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An effort force of 97 pounds is applied to a first-class lever. The effort force is 9 feet from the fulcrum, and the resistance force is 5 feet from the fulcrum. What is the mechanical advantage of the system?

A. 1.8
B. 2.2
C. 1.4
D. 3.6

Answer :

Final answer:

The mechanical advantage of the lever is 1.8.

Explanation:

The mechanical advantage of a lever can be calculated using the formula MA = Le / Lr, where Le is the effort arm and Lr is the resistance arm. In this case, the effort force of 97 pounds is applied at a distance of 9 feet from the fulcrum, while the resistance force is applied at a distance of 5 feet. Therefore, the mechanical advantage is 9 / 5 = 1.8.

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