GR8677 #60



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Comments 
a62 20160920 02:36:59  Easy, but even easier if you look at it this way: a is absolutely meaningless because the zero of potential is arbitrary. So it\'s exactly like the massonaspring model.   Almno10 20101111 23:02:29  Force is the negative gradient of potential energy. The a drops out.
psychonautQQ 20130926 08:41:23 
but this is asking for the frequency, how does force and frequency relate?

  sirius 20081105 22:26:45  A similar solution if you remember . The given V(x) has a vertical shift, a, which can be ignored by shifting your zeropoint energy. So, , solving for makes it depend on b and m.
This is enough, but the problem asks for frequency . So . making f depend on b and m. The answer then is (C).
alemsalem 20100921 06:25:37 
i totally agree, to be sure that it doesn't depend on a, just remember that shifting the potential energy by a constant cannot change the motion (classically) so it doesn't affect the frequency.

 

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