Here you have another interesting videos to watch. You don't need to
understand every single world they say to guess what they are talking
about and I'm sure your interest on simple and complex machines will
grow even more. Have fun!
- http://www.youtube.com/watch?v=4Nf2jc661jU Short an interesting explanation of Wheel & Axle (EUREKA)
- http://www.youtube.com/watch?v=P7xu9O0miEc This is a 12 min .video to learn more about Wheel & Axle ( Force-distance- Speed) and Gears.
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