# Vectors in Newton's Notation

• I
Gold Member

## Main Question or Discussion Point

A very simple question. How do we represent a vector with Newton's notation (writing the arrow symbol with the overdot notation)? Can we write them both above each other. First, the overdot notation and then the arrow symbol?

Thank you a lot for your help...

## Answers and Replies

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Delta2
Homework Helper
Gold Member
you mean which is correct $\dot{\vec{x}}$ or $\vec{\dot{x}}$? I think the first one... But it is a matter of convention, usually in the book or the paper there will be some footnote or appendix that explains the conventions in symbols.

Anyway, I think dot notation for derivatives is used usually with scalar quantities, not with vector ones.

Orodruin
Staff Emeritus
The typical notation would be $\dot{\vec x}$. There is nothing particular with using the dot notation for vectors vs scalars.