A proton moves with a speed of 0.975c. (a) Calculate its rest energy.  MeV (b) Calculate its total energy.  GeV (c) Calculate its kinetic energy.  GeV

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A: Kinetic energy, KE =1 GeV=1000 MeV=103 MeV Mass of proton, mp=938 MeV/c2

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A: (a) Velocity of the proton in the lab frame

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.