Question 2093 Deck General

The correct answer is C) 60 lbs. The reasoning is as follows: For a tackle system with 2 sheaves, the mechanical advantage is 2. This means that the load weight of 100 lbs is distributed across 2 parts of the line. However, to account for the 10% friction loss per sheave, an additional 20% of the load weight must be added to the hauling part pull. Therefore, the required pull on the hauling part is 100 lbs / 2 + (100 lbs * 0.2) = 60 lbs. The other options are incorrect because they do not properly account for the 10% friction loss per sheave in the tackle system.