Kinetic Energy

The kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest.

In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is ½ mv². In relativistic mechanics, this is only a good approximation when v is much less than the speed of light.

Read more about Kinetic EnergyHistory and Etymology, Introduction, Relativistic Kinetic Energy of Rigid Bodies, Kinetic Energy in Quantum Mechanics

Other articles related to "energy, kinetic energy, kinetic":

Planck Constant - Origins - Photoelectric Effect
... The energy transferred by a wave in a given time is called its intensity ... is to say that the spotlight gives out more energy per unit time (and hence consumes more electricity) than the ordinary bulb, even though the colour of the light ... However the energy account of the photoelectric effect didn't seem to agree with the wave description of light ...
Crossed Molecular Beam - History
... angular distribution but has no sensitivity to kinetic energy ... In order to gain insight into the kinetic energy distribution, early crossed molecular beam apparatuses used a pair of slotted disks placed between the ... of interest, as well as time-of-flight mass spectrometers to allow easy measurement of kinetic energy ...
Kinetic Energy in Quantum Mechanics
... In quantum mechanics, observables like kinetic energy are represented as operators ... For one particle of mass m, the kinetic energy operator appears as a term in the Hamiltonian and is defined in terms of the more fundamental momentum operator ... Given an electron density, the exact N-electron kinetic energy functional is unknown however, for the specific case of a 1-electron system, the kinetic energy can be written as where is known as the von Weizsäcker ...
Collision Cascade - Heat Spikes (thermal Spikes)
... If the kinetic energy of the atoms in the region of dense collisions is recalculated into temperature (using the basic equation E = 3/2·N·kBT), one finds that the kinetic energy in units of temperature is ... However, it has been shown that after about 3 lattice vibrations, the kinetic energy distribution of the atoms in a heat spike has the Maxwell-Boltzmann distribution, making the use of the concept of temperature ... At lower energies, the cascade energy is too low to produce a liquid-like zone ...
Mass-analyzed Ion-kinetic-energy Spectrometry
... Mass-analyzed ion-kinetic-energy spectrometry (MIKES) is a mass spectrometry technique by which mass spectra are obtained from a sector instrument that ... The ratio of the kinetic energy to charge of the product ions are analyzed by scanning the electric sector field E ... The width of the product ion spectrum peaks is related to the kinetic energy release distribution for the dissociation process ...

Famous quotes containing the words energy and/or kinetic:

    The persons who constitute the natural aristocracy, are not found in the actual aristocracy, or, only on its edge; as the chemical energy of the spectrum is found to be greatest just outside of the spectrum.
    Ralph Waldo Emerson (1803–1882)

    All my stories are webs of style and none seems at first blush to contain much kinetic matter.... For me “style” is matter.
    Vladimir Nabokov (1899–1977)