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Homework Statement
you want to hang a 15N picture as in part (a) using some very fine twine that will break with more than 12 N of tension can you do this? what if you have it as illustrated in part (b) of the figure?
Homework Equations
Σf=ma
The Attempt at a Solution
[/B]
okay i started with finding the tensions in part (a). using:
Σfx= 0 and so
T2 cos30=T1 cos50
T2=0.74 T1 (1)
Σfy=0
T1sin50 + T2sin30= W
0.76T1+0.5T2 = 15(2)
substituting (1) in (2)
0.76T1 +0.5 (0.74 T1)=15
0.76 T1 + 0.37 T1 =15
1.13 T1= 15
T1= 13.27N
and so T2= 9.82 N
Now what i am not sure about, is first how to know if the ceiling is fine with these tensions or not? I mean should I only find the vertical forces of the tensions here (T1sin50 & T2 sin 30) and see if they are larger than 12 ( obviously they are ) or what?
and regarding the part B. I am also hesitated about using the same Tension values computed from the first part (a) in b also!
thanks in advance
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