- #1
fordrew
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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.
Find Tac + Tbc from the given picture:
ΣFx = 0
ΣFy = 0
Well first, since 500N is being pulled on the x axis-
ΣFx = 0 = Tac*sin(50)+Tbc*sin(30) - 500
500 = Tac*sin(50)+Tbc*sin(30)
The right side is the sum of all the Fx components and they must be equal to zero.
ΣFy = 0 = Tac*cos(50)+Tbc*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?
Homework Statement
Find Tac + Tbc from the given picture:
Homework Equations
ΣFx = 0
ΣFy = 0
The Attempt at a Solution
Well first, since 500N is being pulled on the x axis-
ΣFx = 0 = Tac*sin(50)+Tbc*sin(30) - 500
500 = Tac*sin(50)+Tbc*sin(30)
The right side is the sum of all the Fx components and they must be equal to zero.
ΣFy = 0 = Tac*cos(50)+Tbc*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?