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*[[Pulley]]s
*[[Hydraulic System]]s
===References===
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Force multipliers, pages 86, Gateway GCSE Physics, Oxford, OCR '']