You are using tackle number 6 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 8. Disregarding friction, what is the mechanical advantage of this rig?

Correct Answer: Option C — 18

Mechanical advantage in a compound tackle system is the product of the individual mechanical advantages of the combined tackles. With tackle 6 (MA=6) and tackle 8 (MA=3), the total mechanical advantage is 6 multiplied by 3, resulting in 18. This allows for lifting heavy loads with significantly reduced force.