A body of mass 1 kg is moving in a verti...

A body of mass 1 kg is moving in a vertical circular path of radius 1 m. The difference between the kinetic energies at its highest and lowest positions is [take g=10`m//s^2`]

A

`4sqrt5`

B

20 J

C

10 J

D

30 J

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The correct Answer is:

B

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