You are using tackle number 5 as shown in illustration D029DG below to lift a weight. The hauling part of this tackle is bent to the weight hook of tackle number 9. What is the mechanical advantage of this rig?

Correct Answer: Option A — 20

The mechanical advantage of a compounded system is the product of the individual tackles. Tackle 5 has an MA of 4, and Tackle 9 has an MA of 5. Multiplying 4 by 5 results in a total mechanical advantage of 20, allowing for a substantial reduction in required hauling force.