Recent content by fresh

trying to build an rc car but stuck on how to make sure its wheels are aligned properly so that it can travel in a straight line. Any tips will be welcomed. thanks.

I am having difficulty with the dimensionless part. I am really not sure what to do. I would think that you would need to make a substitution but i am not sure what. I just need a push in the right direction since I want to solve it myself.

Been working on this problem for an hour now. Rescale (dh/dt) = s - a*p*g*(h + (h^2)/R) to obtain the dimensionless ODE y' = a - y - y^2 It seems that the differential equation involving dh/dt is a ricatti equation and I tried finding a particular solution but have had no luck...

Question is: A wedge makes an angle theta to the horizontal. it has a mass M2 and can slide along the horizontal. A mass M1 slides along the frictionless surface of the incline. What are the expressions for the acceleration of the wedge and the mass M1? I am just puzzled. Any suggestions...

stupid me... i know what it is now... my problem was that i had sin(95pi/4) = 1/sqrt2 and not the negative of that... thanks checking the problem :approve:

the question is show that (1+i)^(95) =(1-i)*2^(47) we are told that z^(n) = r^(n) * e^(i*n*theta) when i do the problem i get (1+i)^(95) =(1+i)*2^(47) can anybody verify whether i am right or wrong. thanks :biggrin:

i know it's supposed to be a simple question. frustrating because it is not coming to me. just want a hint. question is: how do you write 1 + cos(theta) + cos (2*theta) + cos(3*theta)... cos(n*theta) using the fact that (z^(n+1) -1) / (z^(n) -1) = 1 + z + z^(2) +... + z^(n) thanks in...

question: show that you can synchronize the clocks in two different frames so that the synchronizations agree at all times. Any suggestion on how to get started would be nice. Thanks.

how does one do a lorentz transformation in the x-direction with v = c/sqrt2. I thought i knew what i was doing with lorentz transformations but now i am confused. While we're at it. Can someone give me a good definition of lorentz transformation. Thanks :confused:

I have an upcoming exam on special relativity. What i would like to know is, how one should proceed about studying for it? Thanks

So i have this question which seems easy enough but maybe iam not thinking in the right mind frame or something. The question is, find the equation of a parobola which has a curvature of 4 at the origin. Some sort of hint/push in the right direction would be appreciated. Thanks

(x^2)(y^3) + x(1 + y^2)y' = 0 the integrating factor to make the above equation exact is (1)/(xy^3) i have worked this equation out and have c = .5x^2 as the solution; however, the textbook says the solution is c = x^2 - y^(-2) + 2lnlyl apparently they got this solution because h'(y) =...

sorry.. about the copying and pasting thing. just click on the link and it should work.

copy and paste the url onto your address bar http://www.imagestation.com/picture/sraid140/p1b9d403a3d9390dd3e7c43eaa1b6e0c8/f6ed3314.jpg the question asks me to draw a graph of electric potential vs distance starting from from point g (starting at g and going around in a clockwise...

after much stress i now have ln(t +1) - t = (-ln399)/4 i am not sure how you would proceed about isolating for t. i have tried using the exponential and other algebraic tactics but it has been to no avail. some sort of suggestion would be much appreciated.