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A stone of mass 0.5 kg is attached to a ...

A stone of mass 0.5 kg is attached to a string of length 2 m and is whirled in a horizontal circle. If the string can with stand a tension of 9N, the maximum velocity with which the stone can be whirled is:

A

`6 ms^(-1)`

B

`8 ms^(-1)`

C

`4 ms^(-1)`

D

`12 ms^(-1)`

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The correct Answer is:
B
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