Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

[Phys-L] Re: notation for initial velocity components



Carl wrote:

I agree with Michael's notation and the reason I like F_12 is because
I think of the 2nd subscript as a semi-optional sub-subscript: hence
F_1 = sum over i of F_1_i.

Using this convention we could write the second AND third laws as

dp_j/dt = - sum over i of F_i_j

and save some time. ;-)

Kind of reminds me of Pythagorstein's theorem: A^2 + B^2 = E/m

--
John "Slo" Mallinckrodt

Professor of Physics, Cal Poly Pomona
<http://www.csupomona.edu/~ajm>

and

Lead Guitarist, Out-Laws of Physics
<http://www.csupomona.edu/~hsleff/OoPs.html>