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Here's a statics problem that I'm unsure about. The system is in static equilibrium, and I'm supposed to find the reaction forces.

{convention: right and up are taken as positive for x and y respectively, and counter-clockwise is positive for moment}

[tex]\sum F_{y} = 0[/tex]

[tex]B_{y} = -1000N[/tex]

[tex]\sum F_{x} = 0[/tex]

[tex]A_{x} + B_{x} = 0[/tex]

Taking the sum of moment at the centre of the circular thingy

[tex]\sum M_{z} = 0[/tex]

[tex]0 = -0.05(A_{x}) + 0.05(B_{y}) - 0.25(1000)[/tex]

[tex]A_{x} = -6000 N[/tex]

[tex]B_{x} = 6000 N[/tex]

I solved this problem assuming [tex]A_{y} = 0[/tex], by inspecting the diagram. Is that alright? In cases where it's not as obvious, how do I determine which reactions are not supposed to be considered? I think I must be neglecting something small.

Thanks in advance.

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# Homework Help: Statics question

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