Box attached to end of a string, what is the max velocity?

[DeathEater]

Homework Statement

a 0.60 kg mass is attached to one end of a 1.7 m string. The string will break if its tension exceeds 60 N. The mass is whirled in a horizontal circle on a frictionless tabletop, such that the other end of the string remains fixed at the axis of rotation. What is the maximum speed of the mass before the string breaks? you may treat the mass as a point mass, assume that the string is ideal, and neglect friction.

A.) 4.6 m/s
B.) 7.8 m/s
C.) 13 m/s
D.) 21 m/s
E.) 170 m/s

Homework Equations

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The Attempt at a Solution

[/B]I don't know where to begin

 

[billy_joule]

Are you familiar with Newton second laws?
What about centripetal force?
Can you draw a free body diagram of the mass?
If the answer to any of these is no, refer to your textbook or google then ask specific question on anything you don't understand.