# Homework Help: Rigid Body Static Equilibrium. Find force components

1. Feb 26, 2012

### sharp12

1. The problem statement, all variables and given/known data

Pin C joins members ABC and CDE

2. Relevant equations

Sum of moments at a point = 0
Sum of vertical forces = 0
Sum of horizontal forces = 0

Weight of triangle acts as a force at its centroid (1/3) its length according to this figure.

3. The attempt at a solution

See pictures.

I get 2 equations with 3 unknowns.

10By + 22.5Dy = 77500
Ay + By + Dy = 7500

Any advice what to do next?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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2. Feb 27, 2012

### sharp12

Since it says Pin C joins members ABC and CDE, does that mean I can take each part and sum forces to zero?

Such that working with CDE Dy = 1500 allowing me to decouple the other two equations.

Just a thought. Not sure.