Illustration of pulley systems demonstrating mechanical advantage, where more rope segments reduce the effort force needed to lift a load.

Diagram showing four pulley systems (1 to 4) with increasing mechanical advantage, each lifting a 100 N load at 10 cm height, using different numbers of rope segments to reduce the effort force (F₂) from 100 N to 25 N, with corresponding distances (s) of 10 cm, 20 cm, 30 cm, and 40 cm.

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Show Answer Key & Explanations Step-by-step solution for: 4.2 and 4.3: Simple Machines pp Mr. Richter. - ppt video online ...

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- The mechanical advantage (MA) of a pulley system is calculated as the load force divided by the effort force, or equivalently, the number of rope segments supporting the load.
- In diagram 1, there is 1 rope segment supporting the load. MA = 100 N / 100 N = 1.
- In diagram 2, there are 2 rope segments supporting the load. MA = 100 N / 50 N = 2.
- In diagram 3, there are 3 rope segments supporting the load. MA = 100 N / 33⅓ N = 3.
- In diagram 4, there are 4 rope segments supporting the load. MA = 100 N / 25 N = 4.
- The distance the rope is pulled (s) is equal to the mechanical advantage multiplied by the height the load is lifted (h). For example, in diagram 4, s = 4 × 10 cm = 40 cm.

Parent Tip: Review the logic above to help your child master the concept of mechanical advantage of a pulley worksheet.

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4.2 and 4.3: Simple Machines pp Mr. Richter. - ppt video online ...