Search results

try it .. you can always drop it if you don't like it after a while. And it helps if you are doing any science or maths oriented subjects at Uni

(1) it's not v=-kv it's v = -kx (2) the 2nd line of the solution should be dx/x = -k dt (without the x) (3) the ln(A) is the constant of integration. like +C. (4) Go back and master 3 unit application of calculus, this particular question is 3 U.

Q 1 -> the 2 equations solved simultaneously gives a double root.. Q 2 -> find the gradients of PS SQ then... with that show they are perpendicular Q 3 -> derive tangent equation of circle at (cos(t),sin(t)) then use 1 -> (b) to find t.

hmm obviously hollywood has not had an impact on you

600 arrange R,R,M,M and B -> 30 ways (5!/(2!2!)) but then you should multiply by 6C3 since there are 6 'gaps' (not 4 since the 2 ends are also gaps!)

anyone have any tips? I seem to make quite a substantial number of silly mistakes...

well.. alternatively, you could do a x=arctan(y^4) substitution.

hmm Pi/4 :P, wasn't that <u>trivial</u> very nice question~

question 2: 2*YXC = XYB YXC + XCY = XYB YXC = XCY XCY = ABC ABY = AXY etc. 3 U cicle geo questions are usually angle bashes hmm think that's about the only thing I could say about it.

second that. hmm maths might hurt you though

hmm x is not a factor of odd functions, only odd polynomials of degree 1 or over. y=sin(x) is odd..

F = dp/dt = m*dv/dt dv/dt = (55-5)/30 ms^-2 = 5/3 ms^-2 F = 35g/3 (units of mass)ms^-2

Archman: that's a bad way to find e numerically, converges too slowly.. that's also why the series I posted for Pi was bad. besides that, It takes much more time on a computer to calculate multiplication -> another reason for not using lim n->inf (1+1/n)^n

hmm most are uni sites, but don't freak out. try searching for classical mechanics here's one, I didn't really look at the contents though http://astrowww.phys.uvic.ca/~tatum/classmechs.html

by the way, both formulae were obtained from the taylor/maclaurin series expansion of functions. f(x) = SUM {n=0 -> inf} [( f_n(a) * (x-a)^n ) / n! ] where a any number. the approximation for e used f(x) = e^x and a = 0 the approximation for Pi used f(x) = arctan(x) and a = 0

4 * ( 1 - 1/3 + 1/5 - 1/7 + 1/9 ...) is the only one I can think of now, but it's not a very good one since it's only conditionally convergent.

Yeah, my teacher refused to signed the subject selection/change form for one student because he reckons that student is not up to it. lets say you need a 80+ in 3 U to keep up in 4U, there's not much point in doing 4 U if you are struggling with 3U.... 4U scaling is horrible if you end up at...

Complain if the school stops you.

sort of.. if you are really desperate and have the time to spare

My maths teachers say: "physics is an application of mathematics" and "Mathematics is a tool for physics" one was a science teacher and another was a maths teacher :p