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Rube Goldberg Machines. Steve Case University of Mississippi NSF NMGK-8 January 2006. Rube Goldberg. Reuben Lucius Goldberg 1883-1970 Born in San Francisco Graduated with engineering degree from University of California Berkeley - PowerPoint PPT Presentation

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  • Rube Goldberg MachinesSteve CaseUniversity of MississippiNSF NMGK-8January 2006

  • NSF North Mississippi GK8Rube GoldbergReuben Lucius Goldberg1883-1970Born in San FranciscoGraduated with engineering degree from University of California BerkeleyWorked as an engineer for City of San Francisco Water and Sewer Department

    NSF North Mississippi GK8

  • NSF North Mississippi GK8Rube GoldbergConvinced his father he wanted to work as an artistGot a job as an office boy in sports department of a San Francisco newspaperKept submitting cartoons until he was publishedMoved to New York to draw daily cartoons for Evening Mail

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  • NSF North Mississippi GK8Rube GoldbergFounding member of National Cartoonist SocietyPulitzer Prize winnerNational figure, often-quoted television and radio personality60-year career

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  • NSF North Mississippi GK8Rube Goldbergs INVENTIONSCartoons that symbolized mans capacity for exerting maximum effort to accomplish minimal resultsCartoons depicted convoluted machines functioning in complex ways to perform simple tasksRube Goldberg has become synonymous with any complex system achieving a basic task

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  • NSF North Mississippi GK8Invention for Opening the Garage Door without Getting out of the Car

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  • NSF North Mississippi GK8

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  • NSF North Mississippi GK8So what . . . ?Rube Goldberg machines are examples of complex machines.All complex machines are made up of combinations of simple machines.Rube Goldberg machines are usually a complicated combination of simple machines.By studying the components of Rube Goldberg machines, we learn more about simple machines.

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  • NSF North Mississippi GK8Simple MachinesHave few or no moving partsMake work easierCan be combined to create complex machines

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  • NSF North Mississippi GK8LeverA rigid board or rod free to rotate around a fixed point called a fulcrumBy varying position of load and fulcrum, load can be lifted or moved with less forceTrade off: must move lever large distance to move load small distance

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  • 2nd and 3rd class lever

    http://www.mca.k12.nf.ca/sm/lever/lever.htmNSF North Mississippi GK8

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  • NSF North Mississippi GK8Inclined PlaneA slope or ramp that goes from a lower to higher levelMakes work easier by requiring less force to lift something a certain distanceTrade off: the distance the load must be moved would be greater than simply lifting it straight up

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  • NSF North Mississippi GK8Wheel and AxleA larger circular wheel affixed to a smaller rigid rod at its centerUsed to translate force across horizontal distances (wheels on a wagon) or to make rotations easier (a doorknob)Trade off: the wheel must be rotated through a greater distance than the axle

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  • NSF North Mississippi GK8ScrewAn inclined plane wrapped around a rod or cylinderUsed to lift materials or bind things togetherTrade off: the screw must be rotated many times to move something a small distance

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  • NSF North Mississippi GK8WedgeAn inclined plane on its sideUsed to cut or force material apartTrade off: the wedge must be moved a large distance to separate the material a small distance

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  • NSF North Mississippi GK8PulleyA rope or chain free to turn around a suspended wheelBy pulling down on the rope, a load can be lifted with less forceTrade off: no real trade off here; the secret is that the pulley lets you work with gravity so you add the force of your own weight to the ropeMultiple pulleys reduce the force needed to lift but increase the distance you need to pull

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  • NSF North Mississippi GK8The trick is WORKSimple machines change the amount of force needed, but they do not change the amount of work done.What is work?Work equals force times distanceW = F x dBy increasing the distance, you can decrease the force and still do the same amount of work.

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  • NSF North Mississippi GK8Examples:Lever: Work is equal on both sides of a lever. You move the long end a LARGE distance with SMALL force. The other end moves a SMALL distance with a LARGE force, which is why it can lift heavy objects.Inclined Plane: It takes a certain amount of work to get the cabinet into the truck. You can either exert a LARGE force to lift it the SMALL distance into the truck, or you can exert a SMALL force to move it a LARGE distance along the ramp.

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  • NSF North Mississippi GK8

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  • NSF North Mississippi GK8Invention for Opening the Garage Door without Getting out of the Car

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  • NSF North Mississippi GK8

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  • NSF North Mississippi GK8SourcesEdheads. 2005. Simple Machines. Accessed January 28, 2006.

    Fyon, Eric. November 8, 1999. Professor Beakers Learning Labs: What is an Inclined Plane? Accessed January 28, 2006.

    Mikkelson, Barbara and David P. 2006. Cog. Accessed January 28, 2006.

    Rube Goldberg, Inc. 2006. Rube Goldberg Machine Contest 2006. Accessed January 28, 2006.

    Smith, Patrick. 2006. Vector Park. Accessed January 28, 2006.

    Telegraph Group Limited. 2006. Lights! Camera! Retake! Accessed January 28, 2006.

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