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Eureka Episode 15 The Pulley

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Part 5 of 5 of the video clips that was viewed in class on 2/3 that corresponded with the questions turned in the same day. Zhou, H., & TVOntario. (2011, November 21). eureka 15 pulley [Video file]. Retrieved January 29, 2016, from https://www.youtube.com/watch?v=nMJgexvovx0

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your Reef The Story So Far there are only two basic machines the inclined plane and believe it what other machines are variations of these a screw is simply a twisted inclined plane a wheel is simply a circular livre open has become an axle and now the poet  the pyramid water that Jack and Jill had to fetch not on top of the what all it was actually at the bottom of a well unfortunately was too heavy or either of them what they needed was a simple shame to give them a mechanical advantage no I'm cleaned up who are the screw what is sorts of machine are there oh yes the wheel what's Joe doing with she is arranging the wheels so that it will Bob on an axle stuck in that post  very good Jill's just rediscovered another sort of super machine a wheel that instead of all of a piece with its axle can we move freely around an axle since this type of wheel is used mainly for pulling things it's called a pulley until can hits the Rope around it and use it to poop  no Jack and user to trike Caleb water that's funny he needs just as much force to try to pull the pail of water up this way kid trying to pull it up the other way I wonder if there's a better way of rigging the pony  amazing Rachel manager and Jack only had one coming to work with and you was able to pull up the sale with half the force Jack needed well when a point is set up like this it's called a single fixed pulley all the time is change the direction of your pool what it doesn't reduce the force you need  but when a pulley is arranged like this it's called a single movable pulley and it how does the force you must exert because the panel of water is now in effect being lifted by two ropes instead of one  pictures of two people in the pale and it looks as if we're getting something for nothing again doesn't it  but of course we're not  if we compare the the jewel raised the pail with the amount of rope she pulled we see that it's the same old story what she's gaining on the force she's losing on the distance the distance that she pulls the Rope is twice the distance that she raises the pale  but the way you use the Polly is still twice as a as the way Jacquees  throw lots of other ways of combining police and it's simple to figure out the mechanical advantage of each system who is count the number of ropes or NuWave the single fixed pulley has one piece of rope supporting a weight of 600 Newtons who put for 600 Newtons output force 600 Newtons and the mechanical advantage is there for one there is any mechanical advantage in other words  the single movable pulley has two ropes supporting the weight input force 300 Newtons Open Force 600 Newtons mechanical advantage 2 here's a system with three supporting ropes input force 200 Newton's output force 600 Newtons mechanical advantage 3  this one also has a mechanical advantage 3 and is in fact the police system that Jill finally rigged up for herself  although she had to pull the Rope 3M for every meter that she raised the pail of water she only needed 200 Newtons of force to do it in the sense she'd become three times as strong now you know why Jack fell down and broke his crown

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Eureka Episode 15 The Pulley

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