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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)/(25)`

B

`(U)/(5)`

C

5U

D

25U

Text Solution

Verified by Experts

The correct Answer is:
D
(d) Potential energy of the spring `U=(1)/(2)Kx^(2) " or " U prop x^(2)`
Stretch is increased to 5 times. Therefore, stored potential energy will be increased by 25 times.
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