How do I mathematically prove this? What is the physics here?

Question

akashdeepdeb · Answer

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amistre64 · Answer

center of gravity, center of mass; equilibrium stuff is roughly my thoughts

surry99 · Answer

Draw a FBD and apply the equations of equilibrium....that's it

akashdeepdeb · Answer

@surry99 Can you draw the forces for equilibrium on it? If it was that simple, I wouldn't have asked it here. 
@amistre64 Okay, but what are the forces on the objects and how to prove it is in equilibrium mathematically?

surry99 · Answer

I did not say it was easy, I was pointing out the principles to apply to solve the problem.
And yes I have already solve it.

amistre64 · Answer

cant prove much from a picture but .... as i see it, if this thing is to balance and stay put then the forces have to cancel out and the center of gravity is above the balancing point
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