[Phys-l] Non-existence of Transverse and Longitudinal Relativistic Mass

[Tom Sandin <sandint@ncat.edu>]

In some of the discussion on the "Invariant mass and ..." thread, 
some seem to think that the value of the relativistic mass depends on 
the angle between the applied force and the velocity.

Please read "In Defense of Relativistic Mass", page 1034, Section 
VII, where the error that leads to this supposed dependence is 
discussed.


http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=AJPIAS000059000011001032000001&idtype=cvips&gifs=yes


In short, the error is trying to state Newton's second law as |F| = 
m|a| when m is not constant.

Tom Sandin