Formulating equation to compare forces

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Homework Statement


We have two balls connected by a string. Let's assume string has no mass. One ball is on the table, spinning in circle at a constant speed, connected by string to a hole with another ball, hanging.
TtEjK
Here is picture. https://imgur.com/a/TtEjK

Homework Equations


Finding equation is the problem here.

The Attempt at a Solution


Obviously Force of ball hanging is F=m1*g
But how do I compare that to force of second ball?
I thought about comparing it to centripetal force, or to use torque, however torque unit (Nm) cannot be compared to (N), or at least I don't know about it.
 
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