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A 4 kg balls is swing in a vertical circ...

A 4 kg balls is swing in a vertical circle at the end of a cord 1 m long. The maximum speed at which it can swing if the cord can sustain maximum tension of 163.6 N will be

A

`6m//s`

B

`36m//s`

C

`8m//s`

D

`64m//s`

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