- #1

Femme_physics

Gold Member

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## Homework Statement

http://img835.imageshack.us/img835/7509/appearsimple.jpg

Long story short: A is fixed to the ground. Point C is a pin joint. W = 200 [N]

The rest is what you see is what you get.

## The Attempt at a Solution

I get too many unknowns no matter what I do.

If I look at only external forces (Which is what we were told to do with every "frame" problem such as this, this is what happens:

Sigma M

_{a}= 1.5W - 1.5By +Ma = 0

(2 unknowns!)

If I do sigma M

_{b}, I get 3 unknowns!

I can't build enough equations with similar unknowns to solve systems of equations.

Even when I look at each member individually I don't have enough to solve for anything.

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