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
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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
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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 system’s I.M.A. is equal to the number of sections of the rope that support the object
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5. The Screw The screw is related to the inclined plane
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

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
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Cool Videos

10. Watch these videos on inclined planes
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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
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12. Back
Compound Machines
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
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-
All other pictures- Google Images-
Inclined Plane Video #1-
Inclined Plane Video #2- Google Videos-
Compound Machines Video-
Facts- Science textbook and google searches
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