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A uniform metre scale of mass 2kg is sus...

A uniform metre scale of mass 2kg is suspended from on end. If it is displaced through an angle `60^(@)` from the vertical, the increases in its potential energy is ,

A

4.9 j

B

9.8 j

C

`9.8 sqrt(3)j`

D

`4.9 (2 - sqrt(3))j`

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The correct Answer is:
A
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