Question 2124Deck General70% to pass
How much weight can you lift by applying 100 lbs. of force to a twofold purchase rigged to disadvantage (do not consider friction)?
AI Explanation
The correct answer is C) 400 lbs.
In a twofold purchase rigged to disadvantage, the mechanical advantage is 4:1. This means that for every 100 lbs. of force applied, the system can lift 400 lbs. of weight, as the force is multiplied by a factor of 4.
The other answer choices are incorrect because:
A) 200 lbs. is only the mechanical advantage for a single-fold purchase, not a twofold purchase rigged to disadvantage.
B) 300 lbs. is incorrect, as the mechanical advantage for a twofold purchase rigged to disadvantage is 4:1, not 3:1.
D) 500 lbs. is too high, as the mechanical advantage for a twofold purchase rigged to disadvantage is 4:1, not 5:1.
Related Questions
#2122 How much force would be required to lift a weight of 200 lbs. using a gun tackle rigged to disadvantage (do not consider friction)? #2123 Unless extremely flexible wire rope is used, the sheave diameter should always be as large as possible, but should never be less than _______________.#2125 What is meant by the term "two-blocked"? #2126 Separating both blocks of a tackle to prepare it for reuse is called _______________.#2127 To facilitate passing the end of a large rope through a block, you could use a _______________.