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Simple Machines. General Information. Simple machines are tools that make work easier. Simple machines have few or no moving parts. Simple machines use energy to work. Click on the link below the picture to see types of simple machines. Inclined Plane. Wedge. Pulley. Wheel and Axle. - PowerPoint PPT Presentation
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Simple Machines
General Information
Simple machines are tools that make work easier.
Simple machines have few or no moving parts.
Simple machines use energy to work.
Click on the link below the picture to see types of simple machines
Inclined Plane Lever Pulley Screw
Wedge Wheel and Axle
Works Cited
Inclined Planes
• A flat surface which is elevated at one end. • The angle formed between the ground and the flat
surface cannot be ninety degrees.• Inclined planes are used to move objects from lower
surfaces to higher surfaces or vice versa.
Examples
Examples of Inclined Planes
Ramp
Stairs
Slide
Path up Hill
Slanted Road
Menu
Levers
• Levers were one of the first simple machines.• They were thought of by Archimedes in 260 BC.• Levers involve moving a load about a fulcrum (center
point).• There are three types: first class, second class, third
class.
Levers Continued
Levers
• First class levers: fulcrum is between the load and the force.Ex. See-saw, scissors, pliers
• Second class levers: load is between the force and the fulcrum.Ex. Stapler, wheelbarrow, nutcracker
• Third class levers: force is between the load and the fulcrum.Ex. Fishing rod, tweezers, tongs
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Pulleys• A pulley is used to reverse the direction of
a force. When pulleys are put together and a pulley system is made, heavy objects are able to be lifted with less force.
• A pulley is made with a wheel that has a groove in its edge. The rope is put around the groove to move the pulley.
Examples
Flag PoleCrane
Window BlindsWishing Wells
Examples of Pulleys
Menu
Screw
• A screw is a shaft or a cylinder with an inclined plane wrapped around it.
• In order to move a screw or an object surrounding the screw, the screw must be rotated.
Examples
Examples of Screws
Menu
Wheel and Axle
• A wheel and axle consists of wheels which are connected by a smaller cylinder, an axel.
• It takes a great deal of force to move the axel, but when the axel is moved the wheels turn a greater distance than the axel.
Examples
Examples of a Wheel and Axle
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Wedge
• A wedge is used to cut objects or to get under a heavy load.
• A wedge is made of two inclined planes put together.
• A wedge acts as a right angle in a splitting motion when forced upon the object.
Examples
Examples of a WedgeAxeZipper Knife
Menu
Works Cited
http://library.thinkquest.org/J002079F/wedge.htm
http://edheads.org/activities/simple-machines/sm-glossary.htm#s2
http://www.mos.org/sln/Leonardo/InventorsToolbox.html
http://www.mikids.com/Smachines.htm
http://sunshine.chpc.utah.edu/javalabs/java12/machine/stdntovrvw.htm