How to find energy value of this frame equilibrium?

[92sergey]

https://www.physicsforums.com/attachment.php?attachmentid=25852&d=1274225973



The A side, move down ward. The O is a pin, with no friction. The A and B have their own mass. The length of the stick or beam or frame is known. How to describe the energy of A down word until reach high h? i forget, the A will stop move at high h = 0, or landing surface. many thanks.

salmanrm@yahoo.com

 

[nickjer]

Well it would help if you included some formulas and work. I suggest starting if the rotational kinetic energy and gravitational potential energy.