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=== Links === | === Links === | ||
==== Wheels and Pulleys ==== | |||
* [http://www.lowtechmagazine.com/2010/03/history-of-human-powered-cranes.html History of Human-Powered Cranes] | |||
* [[wikipedia:de:Flaschenzug|Flaschenzug]](de) | |||
* [[wikipedia:en:Pulley|Pulley]] | |||
==== Cyclic Motion ==== | ==== Cyclic Motion ==== | ||
* [https://www.youtube.com/watch?v=mkQ2pXkYjRM Mechanical Principles] | * [https://www.youtube.com/watch?v=mkQ2pXkYjRM Mechanical Principles] | ||