What is the most common symbol for momentum? Wikipedia says p. Some people seem to use rho.
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When I was a student, it was $\displaystyle p$. We used $\displaystyle \rho$ for density.
It's usually p or P. P is typical for a "total momentum." On the other hand if we're talking about a collision problem, I've also seen q and Q when p and P have already been used. -Dan
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