ماشین های خیلی ساده: اهرم ها | فیزتک

Levers are a simple machine that help us make work easier. But how do they work and how can you make one to help you? Check out this episode with Squeaks and Jessi to learn all about levers! ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/SciShow Or help support us by becoming our patron on Patreon: https://www.patreon.com/scishow

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