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A long elastic spring is stretched by 2 ...

A long elastic spring is stretched by `2 cm` and its potential energy is `U`. If the spring is stretched by `10 cm`, the `PE` will be

A

U/5

B

5 U

C

10 U

D

25 U

Text Solution

Verified by Experts

The correct Answer is:
D
`U=1/2K(2)^2 , U'=1/2K(10)^2=25U`
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