153. You are using tackle number 4 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 11. What is the mechanical advantage of this rig?

The mechanical advantage of the combined tackle system is the product of the mechanical advantages of each individual tackle. Tackle #4 has 4 supporting rope parts, and tackle #11 has 6, resulting in a total mechanical advantage of 4 x 6 = 24.