You are using tackle number 12 as shown in illustration D029DG below to lift a weight. The hauling part of this tackle is bent to the weight hook (w) of tackle number 2. What is the mechanical advantage of this rig?

Correct Answer: Option C — 14

Mechanical advantage is calculated by multiplying the mechanical advantage of the individual tackles in a compound system. Tackle 12 provides a 7-part advantage, and tackle 2 provides a 2-part advantage. Multiplying 7 by 2 results in a total mechanical advantage of 14 for the combined rig.