Statics Lecture: 2D Rigid Body Equilibrium

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I noticed that you didn't mention anything about rollers rotating and whether that is a possible reaction. Google says yes but now I'm wondering how to factor in the weight of the beam wanting to cause the beam to roll in the downward direction that the beam is rotated. I'm not sure if I explained that right or if that comes into play in a more advanced engr class but if anyone can help provide more info, that would be cool. Thanks

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How do I determine if it is a two force member or a three force member?

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