Simple Machines and Compound Machines Project

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Simple Machines and Compound Machines Project

• By Alex Rae
• James Drury
• Anthony Hirsch
• Ian Briggs

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Table of Contents

• Wheel and axle
• Pulley
• Screw
• Lever
• Inclined Plane
• Wedge
• Compound Machines
• Bibliography

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Wheel and Axle

• A wheel and axle is a simple machine made of two
  circular or cylindrical objects that are fastened
  together and that rotate about a common axis
• The advantage of a wheel and axle is when you
  apply an input force to turn the wheel, the axle
  rotates and exerts an output force to turn
  something, such as a screw
• To calculate the mechanical advantage of a wheel
  and axle you use this formula
• Ideal Mechanical advantage Radius of Wheel
• 
  Radius of axle

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Pulley

• A pulley is a grooved wheel with a rope (or a
  chain, or even a steel cable) wrapped around it
• The advantage of a pulley is when you pull on the
  rope of the pulley, you can change the amount and
  direction of your input force
• To find the mechanical advantage of a pulley, you
  need to know what type of pulley it is
• A fixed pulley has an I.M.A. of 1
• A movable pulley has an I.M.A. of 2
• A pulley systems I.M.A. is equal to the number
  of sections of the rope that support the object

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The Screw
See Picture
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• The screw is related to the inclined plane
• The definition of a screw is a shaft with a
  helical groove or thread formed on its surface
  and provision at one end to turn the screw
• Its main uses are as a threaded fastener used to
  hold objects together
• Some examples of screws are bolts, faucets, and
  jar lids

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Levers
See Picture
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• If you have ever ridden on a seesaw or pried open
  a can of paint then you are familiar with levers
• The definition of a lever is a rigid object that
  is used with an appropriate fulcrum or pivot
  point to multiply the mechanical force that can
  be applied to another object
• To find the mechanical advantage of a lever, you
  use this formula
• I.M.A. Distance from fulcrum to input force
• Distance from fulcrum to output
  force

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Lever
Back to Lever Page

• This is a picture of a lever-a seesaw.

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Screw
Back to Screw Page

• This is a picture of a screw .

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Inclined Plane

• An inclined plane is a flat, slanted surface
• An inclined plane allows you to exert your input
  force over a longer distance, which means your
  input force needed will be less than your output
  force
• You can calculate the I.M.A. of an inclined plane
  with this formula
• Ideal mechanical advantage Length of incline
• 
  Height of incline

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Cool Videos
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Watch these videos on inclined planes

• http//www.ngsir.netfirms.com/englishhtm/Incline.h
  tm
• http//video.google.com/videoplay?docid-659780389
  8457949836qinclinedplanetotal56start0num1
  0so0typesearchplindex5

Back to Inclined Planes Page
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Wedge

• A wedge is a portable inclined plane, used either
  to separate two objects, or portions of objects,
  lift an object, or hold an object in place,
• It is a device that is thick at one end and
  tapers to a thin edge at the other end
• Examples would be an ax and a zipper

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Compound Machines
Back

• A compound machine a machine that utilizes 2 or
  more simple machines
• An example of a compound machine is a pencil
  sharpener, a clock, or any other machine that
  uses gears
• To find the I.M.A. of a compound machine, you
  need to know the I.M.A. of each individual simple
  machine

See Pictures
Cool Video
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Compound Machines Video

• http//www.edheads.org/activities/odd_machine/
• Please try to answer the questions in the video
  as best as you can because your score will be
  displayed at the end

Back to Compound Machines Page
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Examples of Compound Machines
Back to Compound Machines Page
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Bibliography

• Picture on table of contents- Ms. Brooks
  webpage-http//www.jenkintown.org/teachers/tlesson
  .php?lid93viewt
• All other pictures- Google Images-
  http//images.google.com/imghp?tabwi
• Inclined Plane Video 1- http//www.ngsir.netfirms
  .com/englishhtm/Incline.htm
• Inclined Plane Video 2- Google Videos-
  http//video.google.com/videoplay?docid-659780389
  8457949836qinclinedplanetotal56start0num1
  0so0typesearchplindex5
• Compound Machines Video- http//www.edheads.org/ac
  tivities/odd_machine/
• Facts- Science textbook and google searches

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