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A girl is swinging in a swing with a con...

A girl is swinging in a swing with a constant angular amplitude `60^(@).` Force constnat of the cushion on which she sits is K. Strings of swing are massless and extensible. Assuming highest point as Datum, match the entries in column I and II

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The correct Answer is:
`A(p,q,s);B(p,q,s);C(r);D(p,q,s)`
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