Question 2094Deck General70% to pass
You are using tackle number 5 as shown in illustration D029DG below to lift a weight of 300 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) 90 lbs.
The reason is that with a 5-part tackle system, the weight of the load (300 lbs) is distributed across 5 parts of the line. Additionally, 10% of the weight is added for friction at each of the 5 sheaves. So the total pull required on the hauling part is 300 lbs / 5 parts + (300 lbs * 10% * 5 sheaves) = 60 lbs + 30 lbs = 90 lbs.
The other options are incorrect because they do not properly account for the 5-part tackle system and the 10% friction factor at each sheave.
Related Questions
#2092 You are using tackle number 7 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? #2093 You are using tackle number 2 as shown 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? #2095 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 (w) of tackle number 10. What is the mechanical advantage of this rig? #2096 You are using tackle number 5 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 9. What is the mechanical advantage of this rig? #2097 You are using tackle number 5 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. What is the mechanical advantage of this rig?