Question 1647Deck General70% to pass
You are using tackle number 8 in illustration D029DG below to lift a weight of 100 lbs. If you include 10 percent of the weight for each sheave for friction, what is the pull on the hauling part required to lift the weight?
AI Explanation
The correct answer is C) 40 lbs.
The pull on the hauling part required to lift the 100 lb weight is 40 lbs. This is calculated by taking the weight of 100 lbs and adding 10% for friction at each of the 3 sheaves, which results in a total pull of 40 lbs.
The other answer choices are incorrect because:
A) 120 lbs is too high, as it does not account for the mechanical advantage of the 3-part tackle.
B) 55 lbs is too high, as it does not include the 10% friction at each sheave.
D) 37 lbs is too low, as it does not fully account for the 10% friction at each of the 3 sheaves.
Related Questions
#1645 According to 46 CFR Subchapter T, rigid plastic and other nonmetallic piping materials _______________.#1646 You are using tackle number 3 as shown in illustration D029DG below to lift a weight of 120 lbs. If you include 10 percent of the weight for each sheave for friction, what is the pull on the hauling part required to lift the weight? #1648 Which vessel must carry a compass on board? (small passenger vessel regulations) #1649 The definition of "partially protected waters", as used in the Regulations does not include _______________.#1650 What is the mechanical advantage, neglecting friction, of tackle number 5 as shown in illustration D029DG below?