The advantage gained by using a block-and-tackle configuration is called what?

• A. Fall Zone
• B. Mechanical Advantage
• C. Signalperson
• D. Hoist

Answer: (B)

The idea being tested is how pulley configurations change the effort required to lift a load. The advantage gained by using a block-and-tackle configuration is called mechanical advantage. In a pulley system, multiple rope segments share the load, so the force you must apply is reduced by the number of supporting segments (ignoring friction). For example, two supporting segments give roughly half the effort, four segments about a quarter, and so on. You trade off needing to pull more rope with having to exert less force, and in real systems friction lowers the actual advantage. The other terms don’t describe this concept: fall zone is about safety distance, a signalperson is a person directing operations, and a hoist is the lifting device itself, not the advantage created by the arrangement.