Question

The potential energy of a particle of mass m at a distance r from a fixed point o is given by u(r)= (kr^2)/2, where k is a positive constant of appropriate dimensions. this particle is moving in a circular orbit of radius r about point o. if v is the speed of the particle and j is the magnitude of angular momentum about o, which of the following is (are) true?
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Answer 1

Answer:

no it's not true my dear friend