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Homework Statement
Assume the system is massless.
The Attempt at a Solution
Here is my quick attempt at drawing a free body diagram for this system:
What I am not sure about is the direction of the force at F. Should the force be A or B?
The prof posted answers online and it says that F is a roller joint and there is no force in the x direction. The reason why it is a roller joint is because if it wasn't it would be over constrained. Does anyone understand what is meant by this?Can't you just assume a direction, and if the force comes out negative, it's in the opposite direction from what you assumed?
Hmm...try looking at this:The prof posted answers online and it says that F is a roller joint and there is no force in the x direction. The reason why it is a roller joint is because if it wasn't it would be over constrained. Does anyone understand what is meant by this?
The reason there is no force in the x-direction at F is because the joint is a roller, it resists no forces in the x-direction. A force in the x-direction on a roller would cause it to move.The prof posted answers online and it says that F is a roller joint and there is no force in the x direction. The reason why it is a roller joint is because if it wasn't it would be over constrained. Does anyone understand what is meant by this?