🔍 Key Concepts

• Block and tackle: know the difference between the moving block and the standing (fixed) block • Meaning of rove to advantage vs rove to disadvantage in terms of pulling effort and mechanical advantage • Direction that the hauling part (fall) exits the system and how that affects required force

💭 Think About

• Picture a simple tackle: one fixed block, one moving block. Trace the rope from where it is made fast to where you are pulling. Which block does your pulling end (hauling part) pass through last? • Ask yourself: when a tackle is arranged to give the greatest help (mechanical advantage), do you want to be pulling on the same end that is attached to the fixed block or the moving block? Why? • Eliminate options that describe something that could happen to any tackle regardless of advantage, versus the one that specifically describes how the hauling part is led.

✅ Before You Answer

• Identify clearly which block is the standing (fixed) block and which is the movable block • Verify which configuration gives you more lifting power for the same pull (greater mechanical advantage), based on where the hauling part comes out • Make sure the choice you pick talks specifically about the hauling part and its relation to one block, not about maintenance or combining tackles