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Tension with two strings and angles

by Ckrueger11
Tags: angles, tension
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Ckrueger11
#1
Sep1-10, 11:29 PM
P: 5
Can someone help me with this problem? I am stuck.

So far I have:


net Force (x) = T1cos30 - T2cos(θ) = 0

net Force (y) = T1sin30 + T2sin(θ) - 120N - 400N = 0


From equation 1 ---> cosθ = (T1cos30)/T2


I attached a picture of the problem.

Not sure my y-equation is correct

How do I find T1 & T2
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rock.freak667
#2
Sep2-10, 12:06 AM
HW Helper
P: 6,207
Split the two tensions into x and y components and then apply the laws for equilibrium:

∑Fx=0
∑Fy=0
∑M=0
Ckrueger11
#3
Sep2-10, 12:36 AM
P: 5
I set the equations up and set them equal to zero but I don't know how to solve them for any of my unknowns.

rock.freak667
#4
Sep2-10, 01:42 AM
HW Helper
P: 6,207
Tension with two strings and angles

Quote Quote by Ckrueger11 View Post
I set the equations up and set them equal to zero but I don't know how to solve them for any of my unknowns.
You have 2 equations with 3 unknowns, you need to take moments about a point to get a third equation.


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