Question

The elongation of spring is 1 cm and its potentialenergy is u. If the spring is elongated by 3cm thepotential energy will be

Answer 1

check the attachment

Answer 2

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Answer...

PE of spring ,

U = ½kx²

u = ½k(1)² = ½k ...... (1)

u' = ½k(3)² = ½k(9).......(2)

comparing equation 1 & 2 ,

u' = 9u

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