What is the mechanical advantage of tackle number 2 as shownin illustration D029DG below?

Correct Answer: Option C — 2.0

Mechanical advantage in a tackle is determined by the number of parts of the line supporting the movable block. In illustration D029DG, tackle number 2 features two parts of the line supporting the load, resulting in a theoretical mechanical advantage of 2.0, effectively halving the effort required to lift.