Hi everyone, first time post at physics forums, I hope to help out some people with calc and I hope to discuss some physics topics too! But however I have a homework question in MECH 234.(adsbygoogle = window.adsbygoogle || []).push({});

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

Find Tac + Tbc from the given picture:

2. Relevant equations

ΣFx = 0

ΣFy = 0

3. The attempt at a solution

Well first, since 500N is being pulled on the x axis-

ΣFx = 0 = T_{ac}*sin(50)+T_{bc}*sin(30) - 500

500 = T_{ac}*sin(50)+T_{bc}*sin(30)

The right side is the sum of all the Fx components and they must be equal to zero.

ΣFy = 0 = T_{ac}*cos(50)+T_{bc}*cos(30)

The right side is the sum of all the Fy components and they must be equal to zero.

When I try to solve the two equations (2 unkowns 2 equations) I just get crazy numbers. I do not know what mistake I could be making otherwise except the angles might be wrong. Or perhaps I should be using the law of cosines or sines?

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# Homework Help: Static Equillibrium

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