SIMPLE MACHINES

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SIMPLE MACHINES

• A swift and easy way for you to learn all about
  the 6 simple machines!!!

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What is a Simple Machine?

• A simple machine is a machine with few or no
  moving parts.
• Simple machines help us by making work easier.
• Ex Pulley, Wedge, Inclined Plane, Screw, Wheel
  and Axle.

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Mechanical Advantage

• A mechanical advantage is the rate of the output
  force\work to the input force\work.
• The mechanical advantage of a machine can be
  found using this equation
• MA Output force (N)\Input force (N)

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Inclined Plane

• An inclined pane is a sloping surface.
• Inclined planes help us by lifting large loads.
• Ex A ramp
• IMA length of slope (m)\height of slope (m)

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Wedge

• A wedge is two inclined planes joined back to
  back.
• Wedges are used to split things.
• Ex Axe or Knife

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Pulley

• A pulley is a wheel that normally has a groove
  around the outside edge. (The groove is for a
  rope or belt to move around the wheel.)
• Ex Flag Pole

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Screw

• A screw is an inclined plane wrapped around a
  shaft or cylinder.
• Ex Jar lid and A bolt

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Wheel and Axle

• A wheel and axle is a large wheel connected to a
  cylinder (axle) so that they rotate together.
• Ex A doorknob and a combination lock
• IMA Radius of wheel (m)\ Radius of axle (m)

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Levers

• A lever is a bar that is free to pivot\turn
  around a point.
• There are 3 types of levers First-Class Levers,
  Second-Class Levers, and Third-Class Levers.
• Ex Seesaw
• IMA Length of input arm (m)\ Length of output
  arm (m)

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How do Simple Machines help us?

• Simple machines help us by making work easier.

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Credits

• By Tierra Dobbins
• Date 10-28-2011
• 4th Block