Re: E=mc ^2 defines speed limit
- From: Lars Kecke <larskecke@xxxxxxxxx>
- Date: Tue, 11 Dec 2007 16:38:47 +0900
BURT wrote:
c=square root of (energy/mass)
This is E=MC SQUARED __ factored
@Why does the speed of light or the cosmic speed limit have anything
to do with the amount of energy stored in mass?
because the "speed limit" works in a way that an object moving at high speed becomes heavier, so that a constant force will give less and less acceleration, the faster that object goes (this increase of "mass" is just another way of looking at the relativistic time dilation, which in turn is a consequence of the fact that the speed of light is always c, no matter how fast you go). In other words
m=m_0/sqrt{1-v^2/c^2}
If you expand this formular for small v/c, you get
m=m_0*(1+v^2/2c^2)
m_0*v^2/2 is the classical kinetic energy of that object, so we can write it as
m=m_0+E_kin/c^2
so \delta m=\delta E/c^2
and then we drop the \delta.
I do not expect an answer to this question.
why not?
Lars
.
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