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Understanding Simple Machines: Types and Applications

Explore the fascinating world of simple machines, including pulleys, levers, wedges, inclined planes, wheel and axles, and screws. These machines help us lift, move, and divide loads with ease. For instance, pulleys raise flags, levers can balance heavy objects on a fulcrum, and wedges like knives cut through materials. Each type serves a unique purpose in our everyday lives, making tasks easier and more efficient. Discover how these fundamental machines continue to play a crucial role in engineering and technology.

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Understanding Simple Machines: Types and Applications

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  1. Simple Machines http://www.fi.edu/qa97/spotlight3/spotlight3.html

  2. Pulley • A pulley uses grooved wheels and a rope to raise, lower, or move a load.

  3. Mini Blinds Crane Flag Pole Pulley

  4. Pulley

  5. Lever • A straight rod or board • Turns on a point known as a fulcrum.

  6. Wheel Barrow See-Saw Pull Tabs Door Hinge Lever

  7. Lever

  8. Wedge • A wedge is an object with at least one slanting side • It is an inclined plane that moves • It ends in a sharp edge • Cuts or splits material apart

  9. Scissors Axe Knife Wedge

  10. Wedge

  11. Inclined PLane • An inclined plane is a slanting surface • Inclined means slanted – like a ramp • It connects a lower level to a higher level

  12. Ramps Stairs Inclined PLane

  13. Inclined PLane

  14. Wheel and Axle • A wheel with a rod – called an axle • Lifts or moves loads • Some “wheels” of a wheel and axle don’t look like wheels • Doorknob or faucet handle

  15. Dump Trucks Door Knob Wagon Faucet Wheel and Axle

  16. Wheel and Axle

  17. Screw • An inclined plane wrapped around a shaft or cylinder.

  18. Spiral Staircase Bolts and Screws Screw

  19. Screw

  20. Comprehension Questions? • An axe is an example of a: a. Pulley b. Wedge c. Wheel and Axle • You would use a pulley to: • Cut food b. Hold pieces of wood together c. Help raise a flag • What is the name of a simple machine with a slanting surface? • The fixed point around which a lever turns is called a: a. screw b. fulcrum c. door knob • A pull tab on a soda can is an example of a: a. inclined plane b. screw c. lever

  21. Work Cited • Edheads:http - www.edheads.org/activities/simple-machines/ • Unitedstreaming - http://www.unitedstreaming.com • Findsounds - http://findsounds.com/ • CA Dept. of Education: http://www.cde.ca.gov/be/st/ss/scgrade3.asp • Mikids - http://www.mikids.com/Smachines.htm • Inventor’s Toolbox - http://www.mos.org/sln/Leonardo/InventorsToolbox.html • The Franklin Institute - http://www.fi.edu/qa97/spotlight3/spotlight3.html • Gettyimages - http://creative.gettyimages.com/source/classes/FrameSet.aspx?&UQR=sbmupa&pk=4&source=front&lightboxView=1&txtSearch=gears&selImageType=7&chkLicensed=on&chkRoyaltyFree=on&chkNLM=on

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