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petormojer
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Homework Statement
A ball is held by a vertical tether C. The vertical tether C is held be tethers A and B (which are slanted). Tether A has an angle of 30 degrees. Tether B has an angle of 60 degrees. The ball has 150 Newtons. The system is in an equilibrium. What are the Newtons in theaters A, B, and C?
Homework Equations
Fnet = 0
The Attempt at a Solution
We know the vertical component force is equal to the two vertical components of the two slanted tethers.
The two tethers' vertical components are 75 N because it is half of 150 N of the ball.
sin 30 = (75 N)/ x // x is the tether A, we solve for x to get the Newtons for A
x sin 30 = 75 N
x = (75 N)/(sin 30)
x = 150 N
sin 60 = (75 N)/ y // y is the tether B, we solve for x to get the Newtons for B
y sin 60 = 75 N
y = (75 N) / (sin 60)
y = 87 N
The tether A has 150 Newtons and tether B has 87 Newtons and tether C has 150 Newtons.
But my book says that tether A has 130 Newtons, tether B has 75 Newtons and tether C has 150 Newtons!
I set the problem correctly though. I have an illustration of the same problem. Note they are in an equilibrium.