A) The bent rod is supported at A, B and C by smooth journal bearings. Determine the magnitude of F2...

Question

A) The bent rod is supported at A, B and C by smooth journal bearings. Determine the magnitude of F2 which will cause the reaction Cy at the bearing C to be equal to Zero. The bearings are in proper alignment and exert only force reaction on the rod. Set F1= 300 Pound.
B) Describe the method of joints and method of sections techniques for analyzing trusses. what are the advantage of each ???

Robert · Accepted Answer

A) The bent rod is supported at A, B and C by smooth journal bearings. Determine the magnitude of F2 which will cause 
the reaction Cy at the bearing C to be equal to Zero. The bearings are in proper alignment and exert only force reaction 
on the rod. Set F1= 300 Pound. 
Solution
Given in the diagram; 
F1 = 300lbs 
Cy = 0 
a = 1ft 
b = 4ft 
c = 2ft 
d = 3ft 
e = 5ft 
α = 300 
β = 450 
θ = 450 
Look in to the diagram above to understand the quantities given in your diagram, 
Now if we draw a free body diagram of the above problem so this will look like,
Here we need to make initial guesses of force at points A , B and C so  
Ax = 100lbs 
AY = 200lbs 
BY = 300lbs 
BZ = 400lbs 
F2  = 500lbs 
Cz = 600lbs 
Now in equilibrium conditions from the free body diagram we have
Solving for Ax , AY, BX, BY,

A) The bent rod is supported at A, B and C by smooth journal bearings. Determine the magnitude of F2 which will cause the reaction Cy at the bearing C to be equal to Zero. The bearings are in proper...

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