Need a Lift? Try a Pulley!
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/pd...
https://dbsenk.wordpress.com/2014/02/...
Watch video Need a Lift? Try a Pulley! online without registration, duration hours minute second in high quality. This video was added by user SciShow Kids 08 September 2016, don't forget to share it with your friends and acquaintances, it has been viewed on our site 662,04 once and liked it 2.6 thousand people.