Need help with a circular motion question

[physics1890]

Homework Statement

A stone has a mass0.2 kg is whirled around on the end of a string of length 20cm. The string will break when the tension exceeds 6kg.m.s-². calculate the maximum speed at which the stone can be whirled around before the string breaks [/B]

Homework Equations

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The Attempt at a Solution

how do I go about this question any ideas ?? All help appreciated[/B]

 

[cnh1995]

Welcome to PF!
Please fill the rest of the template. You need to show your working.

 

[physics1890]

Welcome to PF!
Please fill the rest of the template. You need to show your working.

The trouble is I can't because I don't know how to attempt question

 

[physics1890]

Welcome to PF!
Please fill the rest of the template. You need to show your working.

The trouble is I can't because I don't know how to attempt question

 

[cnh1995]

The trouble is I can't because I don't know how to attempt question

Please read the rules of the homework help section here.
https://www.physicsforums.com/threads/guidelines-for-students-and-helpers.686781/

Don't your lecture notes or textbooks contain any relevant equations? Members aren't allowed to help if no effort is shown by the poster.