Simple machines
https://www.youtube.com/watch?v=GAegAHnfkMs&feature=youtu.be there is where you can watch the video that tells you all about that simple machine that probably helped shape this world and yes I am talking about the pully technically what the pully does is redirect the force so as to make it easier for you to try to haul something up to have you ever tried to lift something to the ceiling or something well it probably would be much easier is you attached a pully to the ceiling run some kind of pully with a hook at the end put a hook on the really heavy object that you want to lift and attach the pully to the hook then well grab the other end of the pully and pull her up while someone else nails screws or whatever you're going to do then you can let go
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