SO simple, yet I'm still SO confused...any pointers in the right direction?
I've done a couple of other mechanism problems with 2 arms going to a point, and start out by breaking it apart a bit, and defining er and el (if that makes sense), with i and j.
But the layout of these two is...
It's obviously been a while since I've worked some of these problems, and I thought I got it, but then something is tripping me up on each of these:
1) Rocket is fired vertically and tracked by radar--obtain an expression that relates the altitude and the horizontal distance between it and...
This problem was part of a post in another thread, but it got really messy over there and no one seems to be responding.
So, here's the problem:
http://www.ihostphotos.com/show.php?id=182816"
And I was told this (but it didn't really help me see what to do, much):
"at least it's a 90 degree...
Okay, my last plead...:rolleyes: ...
Can anyone help me figure out #2:
2) http://www.ihostphotos.com/show.php?id=182816
This was said here:
"at least it's a 90 degree angle! and frictionless ...
try taking Moments around the place where the two F_N intersect
did you sum F_x and F_z...
Hmm...after multiplying through by sqrt(a^2 + 4r^2), I got:
[2PLr - Nb(a^2 + 4r^2) + WLa/2 = 0
then I multiplied through by 2 to get rid of the division by 2 in the last term, and got:
[4PLr - 2Nb(a^2 + 4r^2) + WLa = 0
But how do I apply that to the quadratic formula, if I want to...
In the middle of a statics problem full of unknowns, and am trying to simplify a sum of moments down to the point where I have: a= everything else (a as a function of several other terms).
Keep getting close, but then always have an extra variable or two that won't go anywhere.
Here's the...