Special Theory of Relativity

logistic_guy · Jul 3, 2025

What is the momentum of a proton traveling at

\displaystyle v = 0.85c

?

khansaheb · Jul 3, 2025

logistic_guy said:
What is the momentum of a proton traveling at $\displaystyle v = 0.85c$ ?

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logistic_guy · Jul 7, 2025

I have never seen beauty like this.

\displaystyle p = \frac{mv}{\sqrt{1-\frac{v^2}{c^2}}} = \frac{1.67 \times 10^{-27}(0.85)(299792458)}{\sqrt{1 - (0.85)^2}} = 8.08 \times 10^{-19} \ \text{kg} \cdot \text{m/s}