kinetic energy

noun Physics.
the energy of a body or a system with respect to the motion of the body or of the particles in the system.


Origin:
1865–70

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World English Dictionary
kinetic energy
 
n
Ek, K, T, KE the energy of motion of a body, equal to the work it would do if it were brought to rest The translational kinetic energy depends on motion through space, and for a rigid body of constant mass is equal to the product of half the mass times the square of the speed. The rotational kinetic energy depends on rotation about an axis, and for a body of constant moment of inertia is equal to the product of half the moment of inertia times the square of the angular velocity. In relativistic physics kinetic energy is equal to the product of the increase of mass caused by motion times the square of the speed of light. The SI unit is the joule but the electronvolt is often used in atomic physics

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

kinetic energy n.
The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
kinetic energy   (kə-nět'ĭk)  Pronunciation Key 
The energy possessed by a system or object as a result of its motion. The kinetic energy of objects with mass is dependent upon the velocity and mass of the object, while the energy of waves depends on their velocity, frequency, and amplitude, as well as the density of the medium if there is one (as with ocean waves). Compare potential energy.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
kinetic energy [(ki-net-ik)]

The energy an object has because of its motion.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Visually the movie looks flat and has little kinetic energy.
The kinetic energy produced is collected by a piston pump.
Temperature indicates nothing more than the average movement (kinetic energy)
  of the water molecules relative to each other.
As the particles in the beam are accelerated, their mass increases in
  proportion to their kinetic energy.
Image for kinetic energy
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