Round Table Supported by 3 Legs

[Ckrueger11]

Homework Statement

A 36-kg round table is supported by three legs placed equal distances apart on the edge. What minimum mass, placed in the middle between two supports on the table's edge, will cause the table to overturn?

a) 12kg
b) 24kg
c) 36kg
d) 48kg

Homework Equations

Not sure of any equations

The Attempt at a Solution

I attached a diagram I drew, but I don't know how to do any of the calculations

 

[Borek]

I am not sure about math that will be best to solve the question, but first things first - do you know what condition must be fulfilled for the table to overturn?

 

[Ckrueger11]

I don't know the conditions

 

[Borek]

Something about center of mass and base...