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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 Wheel and Axle A wheel and axle is a simple machine made of two ... – PowerPoint PPT presentation

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Title: Simple Machines and Compound Machines Project


1
Simple Machines and Compound Machines Project
  • By Alex Rae
  • James Drury
  • Anthony Hirsch
  • Ian Briggs

2
Table of Contents
  • Wheel and axle
  • Pulley
  • Screw
  • Lever
  • Inclined Plane
  • Wedge
  • Compound Machines
  • Bibliography

Back to title page
3
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

Back
4
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

Back
5
The Screw
See Picture
Back
  • 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

6
Levers
See Picture
Back
  • 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

7
Lever
Back to Lever Page
  • This is a picture of a lever-a seesaw.

8
Screw
Back to Screw Page
  • This is a picture of a screw .

9
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

Back
Cool Videos
10
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
11
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

Back
12
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
13
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
14
Examples of Compound Machines
Back to Compound Machines Page
15
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

Back
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