Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.

$erg$ is an Energy unit, which means that it is equal to $\frac{mass{\cdot}distance^2}{time^2}$. If I want to calculate the kinetic energy of a body in erg units, in what units should the distance and mass be?

By "what units" I mean $kg$ or $gram$ and $cm$, $m$ or $km$ not $inch$ vs. $m$.

share|improve this question

closed as too localized by Waffle's Crazy Peanut, Qmechanic May 27 '13 at 20:00

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. If this question can be reworded to fit the rules in the help center, please edit the question.

1 erg is $10^{-7}$ joules, so $1\;\text{erg} = 10^{-7}\;\text{kg}\,\text{m}^2\,\text{s}^{-2}$. –  Pulsar May 27 '13 at 11:47
@Pulsar, why is it not an answer? –  Ilya Melamed May 27 '13 at 11:49
A comment is more suitable for 1 line of info. Answers are more appropriate for longer explanations. –  Pulsar May 27 '13 at 11:56
@Pulsar: Then, I'd argue that it's definitely not what you think. Of course, I've seen line-answers (cruelly, even word-answers). It gets in the low-quality review queue and we just say it looks good. There's no rule that small answers should be written as comments ;-) –  Waffle's Crazy Peanut May 27 '13 at 12:47

1 Answer 1

up vote 2 down vote accepted

Use CGS units: grams and cm, as you asked.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.