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A spring of constant 5xx10^(3) N/m is st...

A spring of constant `5xx10^(3)` N/m is stretched initially by 5 cm from the unstretched position. Then the work required to stretch it further by another 5 cm is :

A

12.50 N m

B

18.75 N m

C

25.00 N m

D

6.25 N m

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The correct Answer is:
b
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