Pulleys are used to help lift many things. Lifts, window blinds and cranes often use pulley systems. Let’s change gear to look at gears. Gears are also wheels attached to a fixed axle ...
Maybe it's because she's incredibly strong Or maybe it's because she's using a pulley system. But could a pulley system help these children pull a 12 tonne truck?' PRESENTER:A pulley is just a ...
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