Simple Machines Introduction to Engineering Design © 2012 Project Lead The Way, Inc.

Simple Machines Wheel and axle Pulley Lever Inclined plane Wedge Screw

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

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

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

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

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

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

Lever A bar that is free to pivot around a fixed point Microsoft Office Clipart Microsoft Office Clipart Microsoft Office Clipart

Lever Three components Resistance Force Effort Force Fulcrum

Lever Three types First Class Resistance Effort Fulcrum between effort and resistance forces Effort and resistance forces in same direction Effort Resistance

Lever Three types Second Class Resistance Effort Resistance force between fulcrum and effort force Effort and resistance forces in opposing directions Resistance Effort

Lever Three types Third Class Resistance Effort Effort force between fulcrum and resistance force Effort and resistance forces in opposing directions Resistance Effort

Inclined Plane Slanted surface used to raise an object Microsoft Office Clipart © iStockphoto © iStockphoto Microsoft Office Clipart

Specialized Inclined Planes Wedge Screw Images from Microsoft Office Clipart

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

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

References Microsoft, Inc. (2008). Clip art. Retrieved from http://office. microsoft.com/en-us/clipart/default.aspx Wikipedia. Retrieved from http://en.wikipedia.org iStockphoto. Retrieved from http://www.istockphoto.com/index.php