Why is this FBD statically indeterminate at point A?

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The discussion centers on the statically indeterminate nature of a Free Body Diagram (FBD) at point A. The user has identified three unknowns but is confused about why the system cannot be solved with the given equations of equilibrium. It is clarified that point A is a clamped support, which introduces additional constraints beyond just the x and y reaction forces. This complexity results in more unknowns than equations, leading to the statically indeterminate classification. Understanding the implications of fixed supports is crucial for solving such problems.
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Homework Statement


http://prntscr.com/5aj6fz

Homework Equations


Efy=0
Efx=0
EM=0

The Attempt at a Solution


I drew a FBD and assigned x and y components at A. There is a normal force at B and F and M are known. I took this to mean that there are 3 unknowns in the problem, which should be able to be solved by my understanding.
I don't uderstand why its statically inderterminate. Any help is appreciated. Thank you!
 
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MrJoseBravo said:
assigned x and y components at A
it's a clamped support, not a free moving joint.
 
There is more going on at A besides the x and y reaction forces at this fixed support.
 

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