wtf is a journal bearing and a thrust bearing?

2/12/2006 4:02:39 PM

bearings support loads.

what's the problem asking, though? looking at the course description, i'm going to guess that you don't need to know exactly what a bearing is

2/12/2006 4:30:10 PM

" As a general rule if a support prevents the translation of a body in a given direction, then a force is developed on the body in that direction. Likewise, if rotation is prevented, a couple moemnt is exerted on the body"
book, page 197


in this question it doesnt really matter, forces in the X direction cancel each other out
so u will only have to factor in Ay and By in your FBD.

BTW, if u get anything on 8-1 let me know, i am stuck.

good luck

2/12/2006 6:12:21 PM

alright i got chapter 7 but im stuck on 8-1 too. my three equations are:

vertical: By + Ay - 58.8 = 0
horizontal: -10 + Bx + Ax = 0
moment cw at B: (58.8)(.6) - Ay(1.5) - (10)(.9) = 0

That gives me Ay = 17.52 and the answer says Na = 16.5

2/13/2006 12:24:00 AM

Moment @B: -Ay(1.5)+58.86(0.6)-10(1.05)=16.544 N

2/13/2006 7:28:30 AM

thrust:



journal:

2/13/2006 10:36:57 PM