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Need a Lift? Try a Pulley!

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Jessi and Squeaks just got a new telescope, and they can't wait to check out the night sky! But there's just one problem: it's too heavy to bring up the stairs into the observatory! Join them as they learn about a simple machine that can help them solve their problem: the pulley!
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SOURCES:
http://www.primaryscience.ie/media/pdfs/col/dpsm_investigating_pulleys.pdf
https://dbsenk.wordpress.com/2014/02/05/simple-machines/
Tags
how Pulleys work, Pulleys

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