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Physics

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    $\begingroup$ All symbols are undefined. What does $\mu$ mean, and r, $\phi$, U(r)? And what again is the definition of angular momentum? $\endgroup$ Commented Mar 5, 2021 at 11:49
  • $\begingroup$ Components of Velocity in polar co-ordinates. $\endgroup$ Commented Mar 5, 2021 at 15:51