Recent content by computerex

oops. Sorry, here is a picture: [PLAIN]http://dl.dropbox.com/u/42149615/phq.jpg Solving the simple equations I came up with above, I would get the components of the force as: Fy = mg Fx = Ukmg The magnitude of F will then of course be far greater then 150 N.

Hello guys. I have a test in a couple of days, so I am hoping to get some practice. I'll post any questions I have here, I would appreciate if you guys can help me clear up any confusions. 1. A 400-N block is dragged along a horizontal surface by an applied force F as shown. The coefficient of...

Yep. Through out the entire day I have been subtracting from 432 as opposed to 432/6... Thank you all for helping me :) And this is a testament to why I hate these stupid problems. Conceptual understanding is nice.. But my calc teacher who has been teaching the subject since before I was...

Sorry for the delayed response, but does this seem right? \frac{216 }{n^3} \sum_{i=0}^{n} [i^2] - \frac{72 }{n^2} \sum_{i=0}^{n} [i] - \frac{6}{n} \sum_{i=0}^{n} [1] = \frac{216(n)(n+1)(2n+1)}{6n^3} - \frac{72(n)(n+1)}{2n^2} - 6

Do you see the error? Since we are taking limit to infinity I don't bother evaluating everything, I just get the coefficients..

\lim_{n \to \infty }\sum_{1}^{n}\frac{6}{n}(1+\frac{12i}{n} + \frac{36i^2}{n^2} - 4 - \frac{24i}{n}+2) \lim_{n \to \infty }\sum_{1}^{n}[\frac{6}{n} + \frac{72i}{n^2} + \frac{216i^2}{n^3} - \frac{24}{n} - \frac{144i}{n^2} + \frac{12}{n}] = 0 + 72+432-0-144+0=360

Thank you for the reply.. But I already know how to evaluate definite integrals, I need to know where my mistake is in computing the sum, which is tedious and error prone.. I already know how to set everything, it is an error in simplification. I would highly appreciate it if someone could...

I caught that minutes after posting.. But I still am not getting the right answer. Can someone please calculate the integral so that I can compare it with my work to see where I went wrong?

Hello. I have to solve some integrals using both the standard theorem of calculus and infinite Riemann sums. \int_{1}^{7} (x^2-4x+2) dx = \lim_{n \to \infty } \sum f(x_i)\Delta x_i = \lim_{n \to \infty } \sum (x_i^2 - 4x_i + 2)6/n Evaluating the definite integral results in an answer of 30...

Can you post your drawing routine?

The strange thing is, the site was working perfectly when I made the first post. It stopped responding very soon after.

I am the biggest idiot in the world. As opposed to drawing lines, I should have simply drawn points. The structure seemed correct because it was. There was simply extra information there. I hope I am making sense. Thanks for the help all. Attached picture + the working source below...

I am sorry :( I know it can be a nightmare trying to interpreted undocumented code, so I will try to explain to the best of my abilities what I am doing in the code: #define NUM_OF_IT 100 // number of iterations #define NUM_OF_SETS 1000 // number of ks that will be tested...

I thought I'd have to do some arithmetic later that'd involve casting the constant to a floating point later on, and I was always bad at spelling ;) In any case, you can be rest assured that neither of the aforementioned minor programming inconveniences are the cause of the issue. Do you have...

Hello. Thank you for the reply. Take a look at this: double dataPoints[NUM_OF_SETS][(int)NUM_OF_ITT][2]; This multidimensional array contains the x-y coordinate data for each k that is going to be tested. The number of different k's tested will be NUM_OF_SETS k's. The difference of some k...