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Chapter 6 "Work and Energy" Key Terms
The Key Terms for Chapter 6 in the book Conceptual Physical Science Explorations.
10
Science
8th Grade
01/08/2011

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Term
Conservation of Energy
Definition
Energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes. In an ideal machine, where no energy is transformed into heat, work (input) = work (output) and Fd (input) = Fd (output).
Term
Efficiency
Definition
The percent of work put into a machine that is converted into useful work output.
Term
Energy
Definition
The property of a system that enables it to do work.
Term
Kinetic Energy
Definition
Energy of motion, described by the relationship: Kinetic Energy = 1/2mv^2
Term
Machine
Definition
A device such as a lever or pulley that increases (or decreases) a force or simply changes the direction of force.
Term
Potential Energy
Definition
The stored energy that a body possesses because of its position.
Term
Power
Definition
The time rat of work: Power = Work/Time
Term
Watt
Definition
The unit of power, the joule per second.
Term
Work
Definition
The product of force and the distance through which the force moves: W = Fd
Term
Work-Energy Theorem
Definition
The work done on an object is equal to the energy gained by an object: Work = (the change in) KE
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