A small stone of mass m is attached to a...

A small stone of mass `m` is attached to a light string which passes through a hollow tube. The tube is held by one hand and the free end of the string by the other hand. The mass is set into revolution in a horizontal circle of radius `r_(1)` with a speed `v_(1)` . The string is pulled down shortening the radius of the circular path to `r_(2)`. Which of the following is not correct? (`omega_(1)` and `T` have usual meanings)

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