Ah thanks for the reminder:
question though, what if I have something more complex like:
In[123]:= FindRoot[1 - Cos[x]*Cosh[x] == x*Sin (x)*Cosh (x), {x, 0}]
During evaluation of In[123]:= FindRoot::nlnum: The function value \
{0.+0. Cosh Sin} is not a list of numbers with dimensions {1} at...
Homework Statement
General problem--I don't know how to solve for the characteristic equation in MATLAB or Mathematica to find the solution of an equations such as
Homework Equations
cosh(x)*cos(x) = x
(I know you can re-write this equation but it's just an example)
The Attempt at a...
What if I can't put ice on an incline?
I'm talking over 20 feet of ice, in a contained space. I think the main issue would be to see if the ice maintains relatively the same friction.
Because of the size of the container and the amount of ice I doubt I could place it on an incline.
TOOLS? For measuring surface friction?
Are there any good tools out there for measuring the friction of a surface such as a road or ice or other surfaces?
Homework Statement
http://books.google.com/books?id=qXvESNWrfpUC&pg=PA64&lpg=PA64&dq=%2245-s+freefall%22%2Bskydiver&source=web&ots=RBpsTxCfwb&sig=8uhV4WqEosESfjyP3uyWtn5J7Ys&hl=en&sa=X&oi=book_result&resnum=1&ct=result#PPA64,M1
(P64 Prob2.4)
I need to find the equations of motion for a...
single degree of freedom systems
assuming you start with mx'' + cx' + kx = 0
where '' stands for the dots above x
the solution to that equation would be λ^2 + (c/m)*λ + k/m = 0
the characteristic equation
c --> constant of proportionality
λ --> root of the equation from the...
oscillation question -- vibration topic
Book is asking me to prove that ξ = 1 corresponds with the smallest value of c such that no oscillation occurs.
Says let λ = -b (b is a positive number)
and that's all I'm given.
I'm not even sure I understand how you can tell there is no...
Midpoint between what though? Midpoint between the points maybe?
I'm confused. I was thinking the first thing was to create a vector parallel to the lines or vector equation of the line based on the two points (if I did that part correctly)
what I got was
<x,y,z> = <2,-1,1> + t<1,2,4> =...
another problem that's confusing me
I have one more problem.
Would this:\frac{87}{(x)(x^{2}+13x+38)}
simplify to something like
\frac{Ax+B}{x^{2}+13x+38} + \frac{C}{x} = \frac{87}{(x)(x^{2}+13x+38)}
Hmm, I'll have to try to this in a second.--wow the method gao xiong did works but I don't recall seeing this in my initial searches through the textbook or online.
Nice method, thanks.
Big-T, I don't understand where the a/s would come from if the highest polynomial is 9s^3 (or the highest...
Yep. I understood that much, but I'm confused about what I can do from there because I end up with:
\frac{A}{3s^{2}} + \frac{B}{3s+1}
which would equal out to
\frac{A}{3s^{2}} + \frac{B}{3s+1} = \frac{7}{3s^{2}(3s+1)}
then
7 = A(3s+1) + 3Bs^{2}
--which is where I'm stuck, because...