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A stone of mass1/2kg iswhirled round the...

A stone of mass1/2kg iswhirled round the end of a piece of string in a horizontal circle of radius half a meter with a uniform speed of 1 `m//s`. The tension in the string is

A

`25 xx 10^3 dynes`

B

`10^5 dynes`

C

`5 xx 10^4 dynes`

D

`4 xx 10^5 dynes`

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