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Relativistic Energy and mass

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Richard Datwyler

on 8 March 2017

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Transcript of Relativistic Energy and mass

Relativistic
Energy & Mass

Just as with momentum, our energy term needs to be scaled to accommodate high terms without making the speed exceed the speed of light.
We need to consider 3 terms related to energy:
the total energy
the kinetic energy
the rest energy
The total will be the other two added together. and the rest will be the energy when not moving
To accelerate a particle up to .9c requires work, and then from .9c -.99c requires work find the ratio of the two.
Energy and momentum are closely related. Because of this we say that there is an invariant term, meaning as one changes reference frames this term is constant.
one other principle of note, is that of energy and mass. Because elements have known masses, we can say they have known energies, interchangeably, often shown in MeV.
What is the speed and momentum of a 975 MeV proton.
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