Recent content by Lifeinsteps

Thanks so much, I figured out the problem based on your last comment, and just in time. I ended up being the only one in the class who was able to complete the assignment, which made me feel almost bad considering how much help I had to get for it. The professor liked it though! Thanks...

Bump! Sorry, I hope that's allowed, I have to get this problem figured out by 1:00 PM, and it's 8:59 AM now. Can anyone help me with this last little step? If I can get this angle then the rest of the problem is pie.

I'm still not really sure, exactly, because of the unknown variable... Won't it end up looking like this? 309.5 -200cos(Θ1) = -200sin(Θ1) arccos{309.5 -200cos(Θ1)} = arccos{-200sin(Θ1)} Because when I try to put it either of those I just get a domain error. I can only assume that I'm not...

Okay, so I have to use either arcsin or arccos? I'm sorry; I'm not really sure how to do that right here. Won't that end up kind of encompassing the whole other side? Thanks again, by the way, you've been a huge help.

Uh, I can give it a shot, is it something like this? 1) -143 = Acos(210°) + 200cos(Θ1) + 84.5 -84.5 -227.5 = Acos(210°) + 200cos(Θ1) Simplify -227.5 = A(-.87) + 200cos(Θ1) /(-.85) 261.5 = A + 200cos(Θ1) -200cos(Θ1)...

-143 = Acos(210°) + 200cos(Θ1) + 84.5 205 = Asin(210°) + 200sin(Θ1) + 181 Like that? But I'm still not really sure how to solve them... I remember something looking like this in high school Pre-Calc but I really don't remember how to do it off the of the top of my head.

Um, Ax = Acos(210°) Ay = Asin(210°) Bx = 200cos(Θ1) By = 200sin(Θ1) That's what you mean, right?

Well, yes, I got this far: -143 = Ax + Bx + 84.5 205 = Ay + By + 181 Before, but I wasn't sure what to do. I didn't think of creating a system of equations! I still can't really remember how to do it though... Is there some kind of instructional or something you can recommend? My...

I thought I was familiar enough to handle these problems, but apparently, I'm not! Is there some kind of equations or something I should know that can help me out here? I am totally stumped! I calculated all the components to the two that it's possible for, but I just have no idea what to do to...

Homework Statement R is the resultant of the three forces A, B, and C, that is R = A + B + C. If A = (A) N, 210°, B = 200 N, Θ1, C = 200 N, 65°, and R = 250 N, 125°. Use the component method to determine A and Θ1. (There may be two solutions to this one.) Check your result by...