A long spring is stretched by x cm its P . E . is U . If the same spring is stretched by Nx cm the P . E . stored in it will become

Question

A long spring is stretched by x cm its P . E . is U . If the same spring is stretched by Nx cm the P . E . stored in it will become, U / N, NU, N 2 U, U / N 3

MARKS App · Accepted Answer

U = 1 2 K x 2 U ′ = 1 2 K N x 2 = 1 2 K x 2 N 2 = U N 2

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