Determine the magnitude of F2 which will cause the reaction Cy at the bearing C to be equal to zero

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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
reactions on the rod. Set F1 = 300 lb.

[@ericcabrera8239]

this whole question took my an hr to complete

[@AbuZJabrek]

for equation 4 before you moved the varablies to the other side why is 212.13 postive and not negative

[@andrewfilippi4476]

can you please explain a little more as to why there is no Cy,By, or Az in the free body diagram, thanks

[@drc022800]

Because these are journal bearings and not thrust bearings. Thrust bearings restrict movement in the Cy By and Az directions so there would be a reaction force but since these are journal bearings the movement is not restricted and there is no reaction force.

[@aaronm6263]

I don’t understand why we don’t have moments Mx,y,z if the object is restricted from rotating abt these axes?

[@za3676]

Shouldn't equation 6 have Ax(4) because you put 5 but that is the distance from the force.

[@kiss6917]

Equation 6 comes from the moments around z, therefore the distance is involved

[@drc022800]

yes it should be ax 4 and not ax 5

[@cyberslumz]

why isnt Cz part of the moments equation for X?

[@LimblessAnt]

Dropping in 2 months later, I think it is because Cz is directly on the x-axis and therefore would not influence its turning

[@cyberslumz]

@@LimblessAnt I dropped out but thanks anyways

[@joeyGalileoHotto]

So basically the premise of the problem is to not include Cx into the force calculations?

[@kaigardner3399]

These joints are called journal bearings and they can slide in and out so Cx doesn't exist

[@Brickswol]

Many of your videos are helpful, but on this one I think you skipped over alot of important details that would help students follow what you're doing.

[@shannyatigala7407]

it's hard to find your mouse pointer when you explain something on the picture other than writing

[@user-mc8qf7ig4p]

could someone tells me why cy = 0 plz?

[@JoThoLuka]

The question is to find what magnitude of F2 will make Cy=0. Cy therefore has to be 0.

[@sohaib31syed27]

I have a question what can I do send me your email I'd so I can send you the question with diagram