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The potential energy of a certain spring...

The potential energy of a certain spring when stretched through a distance 'S' is `10` joule. The amount of work (in joule) that must be done on this spring to stretch it through an additional distance 'S' will be

A

30

B

40

C

10

D

20

Text Solution

Verified by Experts

The correct Answer is:
A
`(1)/(2) kS^(2) = 10` J [Given in the problem]
`(1)/(2) k [ 2S)^(2) - (S)^(2) ]=3 xx (1)/(2) kS^(2) = 3 xx 10=30` J
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