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1 vote
0 answers
91 views

Problem with symmetry and integral of motion in Classical Mechanics [closed]

I am currently working through the problem 4.10 in Kotkin and Serbo's book "Collection of Problems in Classical Mechanics". The problem consists in showing that the quantity \begin{equation} ...
Leonardo's user avatar
4 votes
1 answer
479 views

Quantity conserved for the 3D spherically symmetric harmonic potential $V(r)=\alpha r^2$ [duplicate]

I know that in the case of the Kepler problem there is a quantity (other than energy, momentum,...) conserved which is the Runge-Lenz vector. Is there also an "exotic" quantity conserved for a 2-Body ...
Syrocco's user avatar
  • 1,168
26 votes
1 answer
18k views

Constants of motion vs. integrals of motion vs. first integrals

Since the equation of mechanics are of second order in time, we know that for $N$ degrees of freedom we have to specify $2N$ initial conditions. One of them is the initial time $t_0$ and the rest of ...
user avatar
1 vote
0 answers
1k views

Do symmetries increase the number of conserved quantities? [closed]

Let us consider a classical mechanical system of N particles in a constant external field. We have 3N coordinates and 3N velocities, so totally 6N unknown variables. We have 6N ordinary differential ...
Vladimir Kalitvianski's user avatar