A pulley is a rope passing through a wheel to lift something, We all first did a test with two people who had a stick well someone was in the middle they had to try grab the stick well the two people hold them, this would take alot of effort. Then we used rope and looped it and it made it so you need less effort to pull that is called a pulley. We watched 2 videos explaining pulleys so we could fill out a google drawing with question. If we added more loops we would need more ropes to get the same effect.
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