A long spring is stretched by 2 cm and i...

A long spring is stretched by 2 cm and its potential energy is U. IF the spring is stretched by 10 cm. its potential energy will be

A

5 V

B

25 V

C

`(V)/(25)`

D

`(V)/(5)`

Verified by Experts

The correct Answer is:

B

P.E.(V) `= (1)/(2) Kx^(2)`
`:. (V')/(V) = ((1)/(2) K x'^(2))/((1)/(2)Kx^(2)) = (10 xx 10)/(2 xx 2) = 25 :. V' = 25 V`

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