What Are the Correct Reactions at Points A, B, and CD in This Mechanics Problem?

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The discussion focuses on determining the reactions at points A, B, and CD in a mechanics problem involving a smooth collar and a rocker. The normal reactions are defined as RC at collar A, RN at rocker B, and RD at point D. The moment at rocker B is specified as 4 kN. The user presents equations based on moments and forces but encounters errors in their calculations, indicating a need for clarification on the correct approach to solving the problem.

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Simple moments ! Can't do ! Urgent

Homework Statement



Determine the reactions at the smooth collar A, the rocker B and the shortlink CD.

Homework Equations


RC = Normal reaction at smooth collar A.
RN = Normal reaction at rocker B.
RD = Normal reaction at D.
Moment at rocker B is given to be 4KN.
All distance shown in the diagram(made in paint) are in meters.


The Attempt at a Solution



The equations I made are :-
Taking moments at B...
(RCsin45*10) + (2.5cos60*3) + (4) = (RCcos45*3) + (RD*3) + (2.5sin60*6)
Forces...
RCcos45 = RD + 2.5cos60
RCsin45 + RN = 2.5sin60

The answer I get is wrong after calculating. Where does the error lie?
 

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