The greatest increase in mechanical advantage occurs at ____ parts.

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Multiple Choice

The greatest increase in mechanical advantage occurs at ____ parts.

Mechanical advantage grows as more rope supports the load. The biggest jump happens when the first movable pulley is introduced, because the load then is shared by two rope segments instead of only one. That doubles the force multiplication for the same effort, which is a much larger gain than what comes with later additions. Later pulleys still increase MA, but the incremental gain is smaller as you add more strands and the geometry and rope length limit the further improvements. So the greatest increase occurs at the point where the first movable pulley is added, which is the second part.

Mechanical advantage grows as more rope supports the load. The biggest jump happens when the first movable pulley is introduced, because the load then is shared by two rope segments instead of only one. That doubles the force multiplication for the same effort, which is a much larger gain than what comes with later additions. Later pulleys still increase MA, but the incremental gain is smaller as you add more strands and the geometry and rope length limit the further improvements. So the greatest increase occurs at the point where the first movable pulley is added, which is the second part.

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