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Glossary
Compound Machine: The combination of two or more simple machines. (Page 1)
Efficiency: The work done by a machine divided by the work put into a machine, shows how
well a machine does work. (Page 2)
Inclined Plane: An even, sloped surface. (Page 6)
Joules: The measure and unit for work. (Page 10)
Lever: A bar that rotates around a fixed point. (Page 8)
Machine: A device that makes work easier, and changes the size and/or direction of the force.
(Page 1)
Mechanical Advantage: the advantage gained by using a machine in transferring force. (Page 2)
Power: The rate at which work is done. (Page 10)
Pulley: A grooved wheel that turns freely in its frame, which is called a block. (Page 7)
Screw: An inclined plane wound around a central cylinder. (Page 9)
Watts: The measure and unit for power. (Page 10)
Wedge: A modified inclined plane that separates or holds force. (Page 1)
Wheel and Axle: A wheel connected to a main body, sometimes with other wheels. (Page 4)
Work: Force and Motion in a direction. (Page 10)
Work Input: Work done on a machine. (Page 3)
Work Output: Work put into a machine. (Page 3)
All clip art: Microsoft Corporation, Microsoft PowerPoint, March 8, 2011.
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