- #1
sona1177
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- 1
Homework Statement
A 20 kg loudspeaker is suspended 2.0 m below the ceiling by two cables that are each 30 degrees from the vertical. What is the tension in the cables
Homework Equations
F=ma
Fx=max
Fy=may
The Attempt at a Solution
a=0
Here is how I solved it but I am not sure if it is right. Also, I don't understand how to use the 2.0 meters given in the problems statements. Anyways, here goes:
Fnetx=Wx + T1x + T2x =max=0
0 + T1 - T2=0
T1sinθ -T2sinθ=0
T1sinθ=T2sinθ
T1=T2
Fnety=wy + T1y + T2y=may=0
-w + T1 + T2=0
(20 * -9.8) + T1cosθ + T2cosθ=0
-196 + (T1 + T2)(cosθ)=0
(T1 + T2)(cosθ)=196
(T1 + T2)=196/cos(30)
(T1 + T2)=226.3
Since T1=T2, then 226.3/2=113 N. Therefore 113 N is the tension for both ropes?
Is this correct?