Using Newtonian physics, physicists have found an expression for the value of kinetic energy, specifically KE = ½ m v^2. Einstein came up with a very different expression, specifically KE = (gamma – 1) m c^2. In this video, Fermilab’s Dr. Don Lincoln shows how these two equations are the same at low energy and how you get from one to the other.
Relativity playlist:
Fermilab physics 101:
https://www.fnal.gov/pub/science/particle-physics-101/index.html.
Fermilab home page:
https://fnal.gov
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