What do the Symbols (r) and (m) Mean?

[neutrino']

First of all, for what audience is the book intended for? I mean for high school students or undergrads?

2nd. I encountered a symbole (r) with a dot above it and also (m) with a dot too? what do these symoles mean??

thx

 

[yenchin]

Huh? Which book?

 

[neutrino']

the lectures from his site!

 

[yenchin]

Can't you please give us the exact URL for the exact lecture and the exact page of what you are asking?

 

[neutrino']

download book one.
in book one, page 8 or -2-

www.damtp.cam.ac.uk/user/tong/dynamics.htm

 

[Doc Al]

It says right on the webpage:

The notes are based on lectures given to final year undergraduates during the fall of 2004 and 2005.​

It's meant as a text for upper level undergrads, not high school students. (At least not the typical high school student.)

 

[Doc Al]

The r with a dot means the derivative of r with respect to time, which is the velocity.

 

[neutrino']

thx doc!