Is the Sum of All Moments Zero at Any Point if Zero at Point A in 2-D Mechanics?

[kasse]

If the sum of all moments about a point A of a body is 0, will it then be 0 anywhere else on the body? (I'm working in 2-D)

 

[russ_watters]

Maybe. It depends entirely on the particulars of the problem.

 

[Hootenanny]

Not necessarily.

 

[kasse]

So I don't necesarrily have equilibrium if I find that F(res) = 0 and that M(A) = 0 ? What more do I need to `show eq.?

 

[kasse]

I assume that it works the other way around: if I know that there's equilibrium, then the sum of all moments around any point is 0.

 

[Hootenanny]

I assume that it works the other way around: if I know that there's equilibrium, then the sum of all moments around any point is 0.

That is correct. With respect to your previous post, it depends on the situation, as Russ said in your other thread.

 

[berkeman]

If the sum of all moments about a point A of a body is 0, will it then be 0 anywhere else on the body? (I'm working in 2-D)

kasse, do not multiple post the same question across multiple forums. I've merged in the thread that you started in Classical Physics with the same question.