- #1

Kunhee

- 51

- 2

## Homework Statement

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Two particles of rest mass m0 approach each other with equal and opposite velocity v, in a laboratory frame. What is the total energy of one particle as measured in the rest frame of the other?

But the question gives a clue which reads "if (v/c)^2 = .5, then E = 3m0c^2."

## The Attempt at a Solution

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My current understanding of this question is that the total energy is simply m0c^2 multiplied by the Lorentz factor. Could you explain to me how the clue is relevant?