- #1

ognik

- 643

- 2

## Homework Statement

find series expansion of relativistic energy formula, At what speed is there a 10% correlation to the non relativistic KE.

## Homework Equations

$$ E=\frac{mc^2}{\sqrt(1- \frac{v^2}{c^2})} = mc^2 + \frac{1}{2}mv^2 + ... $$

## The Attempt at a Solution

I found the series above, confirmed in the text.

This is one where I don't understand the (2nd part) question. Isn't the non relativistic KE just the 2nd term of the above equation? I would just get a velocity in the opposite direction to c which is meaningless ...