A long spring is stretched by 3 cm and its potential energy is V . If the spring is stretched by 6 cm , its potential energy will be

Question

A long spring is stretched by 3 cm and its potential energy is V . If the spring is stretched by 6 cm , its potential energy will be, V, 2V, 3V, 4V

MARKS App · Accepted Answer

P . E . = 1 2 × Y × strain 2 = 1 2 × Y × l 2 L 2 or P.E P . E . ∝ l 2 ∴ P . E 2 P . E 1 = l 2 2 l 1 2 = 6 2 3 2 = 36 9 = 4 ∴ P . E . 2 = 4 P . E 1 = 4 V

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