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Simple Machines Introduction to Engineering Design
© 2012 Project Lead The Way, Inc.
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Simple Machines Wheel and axle Pulley Lever Inclined plane Wedge Screw
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Work Work is the transfer of energy from one system to another
Presentation Name Course Name Unit # – Lesson #.# – Lesson Name Work Work is the transfer of energy from one system to another Mechanical work is the product of the magnitude of force in the direction of displacement and the distance through which a body moves This formula is from the PLTW Engineering Formula Sheet. Displacement
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Work Work indicates that a force is exerted and is moving something
Presentation Name Course Name Unit # – Lesson #.# – Lesson Name Work Work indicates that a force is exerted and is moving something Simple machines make work easier This formula is from the PLTW Engineering Formula Sheet. Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart © iStockphoto
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Wheel and Axle Two connected circular objects of different diameters
Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart
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Special Wheel and Axle Gear Wheel with teeth
Teeth of one gear push against teeth of another gear Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart
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Pulley A wheel (and axle) with a rope running over it
Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart
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Pulley A pulley can change the direction of force
10 lb A pulley can change the direction of force Multiple pulleys in combination can reduce the effort force to move an object 10 lb 80 lb
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Lever A bar that is free to pivot around a fixed point
Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart
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Lever Three components Resistance Force Effort Force Fulcrum
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Lever Three types First Class Resistance Effort
Fulcrum between effort and resistance forces Effort and resistance forces in same direction Effort Resistance
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Lever Three types Second Class Resistance Effort
Resistance force between fulcrum and effort force Effort and resistance forces in opposing directions Resistance Effort
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Lever Three types Third Class Resistance Effort
Effort force between fulcrum and resistance force Effort and resistance forces in opposing directions Resistance Effort
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Inclined Plane Slanted surface used to raise an object
Microsoft Office Clipart © iStockphoto © iStockphoto Microsoft Office Clipart
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Specialized Inclined Planes
Wedge Screw Images from Microsoft Office Clipart
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Wedge Inclined plane that moves A triangle shape with a sharp point
Can split, cut, tighten, or hold things together Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart
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Screw Inclined plane wrapped around a shaft
Used to fasten things together or move things © iStockphoto Worm gear © iStockphoto © iStockphoto © iStockphoto Corkscrew conveyor Parking garage ramp
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References Microsoft, Inc. (2008). Clip art. Retrieved from microsoft.com/en-us/clipart/default.aspx Wikipedia. Retrieved from iStockphoto. Retrieved from
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