Solution:
In SHM, kinetic and potential energies (and their difference) oscillate with twice the frequency of the displacement. Therefore, their period is half of the displacement period, $ T' = T/2 = 4/2 = 2 $ sec.
A loaded vertical spring executes S.H.M. with a time period of 4 sec. The difference between the kinetic energy and potential energy of this system varies with a period of: (1994)
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