A point charge Q is fixed at the center of an insulated disc of mass M & radius R.The disc is resting on a rough horizontal plane.Another charge (-Q) is fixed vertically above the center of the disc along a height h.If the disc is displaced slightly in the horizontal direction & released.Find the period of oscillation of the disc. Note -Don't give me only hint as i already got the hint as i tried but can't solve it .So,give me the solution with the explanation and also with the diagram.

Asked by Joginderlpaul Khurana | 31st Mar, 2013, 09:01: AM

Expert Answer:

on displacing the net force which will act on the disc to bring it to its original position:
F costheta=

Answered by  | 1st Apr, 2013, 03:42: PM

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