CG of Rectangular Frame with Offset Weight: Need Counterweight?

AI Thread Summary
The discussion revolves around the stability of a rectangular frame with an offset weight attached to its lower arm. The main question is whether the weight will create an unbalanced condition and if a counterweight is necessary to maintain a horizontal position. Participants express uncertainty about the torque effects around the attachment point and the appropriate classification of the lower arm as either simply supported or cantilevered. The consensus is that expert input is needed for a definitive answer. Overall, the inquiry highlights the complexities of calculating center of gravity and torque in structural applications.
vscid
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Hi,

I had a question on CG.
I have a rectangular frame (say made of square tubes) and have a weight fastened to its lower arm (as shown in the attached pic.), which is not fastened on the center of the lower arm but is offset. however, the CG of the weight is in the same line as the pick point P.
In this case, will the weight be unbalanced? (will I need a counterweight to keep it exactly horizontal). If not, would there be a moment in the lower arm?
Would i need a counterweight in any case?
Thanks!
 

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Welcome to PF, Vscid.
That's a good question. My instinct tells me that there would be a counter-clockwise torque around the attachment point, but I suspect that the math will say otherwise. I'm not educated in these matters, so hang on for someone else to help you out.
 
If I consider the lower arm as a beam, do I consider it simply supported or cantiliver?
 
Sorry, dude... I can't answer that. I just build stuff.
As I said, though, there are experts here who will help you out shortly.
 
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