# Simple Machines and Compound Machines Project - PowerPoint PPT Presentation

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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
• 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

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
• 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
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
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
webpage-http//www.jenkintown.org/teachers/tlesson
.php?lid93viewt
• All other pictures- Google Images-