Recent content by ko_kidd

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?

No one has an idea of how to answer this one?

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> =...

I got two points that are (2, -1, 1) and (3, 1, 5) and I need to find the equation of the plane equidistant from those points. Anyone?

I don't doubt what you're saying, but how do [you] rationalize a 1/s and 1/s^2 from one 1/s^2. I've never seen that before.

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...

\frac{7}{3s^{2}(3s+1)} Can this be decomposed, and how?