Question 2112 Deck General

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What is the mechanical advantage, neglecting friction, of tackle number 12 as shown in illustration D029DG below?

Diagram for USCG Deck General: What is the mechanical advantage, neglecting friction, of tackle number 12 as...
A 3.0
B 5.5
C 6.0
D 7.0
AI Explanation

The correct answer is D) 7.0. The mechanical advantage of a tackle system, neglecting friction, is equal to the number of parts of the rope supporting the load. In the illustration D029DG, the tackle system has 12 parts of the rope supporting the load, so the mechanical advantage is 7.0. The other answer choices are incorrect because 3.0 is too low, 5.5 is too low, and 6.0 is also too low for a 12-part tackle system.

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