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This question's answer was completely different to mine. Question 7 (CHAPTER 25C) Solve the differential equation d^2x/dt^2 + 16x = 0 subject to the conditions x=3 and dx/dt=16 when t=0. Find the maximum displacement and the maximum speed if x metres is the displacement of a particle moving in...

Re: HSC 2012 Marathon :) Simple Harmonic Motion Fitzpatrick 3U Chapter 25(C) Q4(a) The displacement x at time t of a point moving in a straight line is given by x=asin(nt+epsiton). Find the form wich this expression takes if initially: b) x=0 and the velocity is negative ------- Hey i'm...

Any thought on question B? I used that the rationalisation that is dx/dt = -(dx/dt) then x=-x. I use the same idea that at at=0, x=0 and solved for epsiton. I got that epsiton=sin^-1(0)=0 in the first question i looked at the back of the page and it said i need a pi/2 and interpreted the same...

Thanks dude, thats right since the this is the sinx function then at t=0, v=0 and v'=0. Just a thought, if i put sin^-1(0) it comes up with zero --> however i do know that that meant x=0, pi/2, pi, 3pi/2 and 2pi or x=0,90,180,270 and 360. How will you choose? Why can't i just say epsiton=0?

Simple Harmonic Motion Fitzpatrick 3U Chapter 25(C) Q4(a) The displacement x at time t of a point moving in a straight line is given by x=asin(nt+epsiton). Find the form wich this expression takes if initially: b) x=0 and the velocity is negative ------- Hey i'm trying to this question and...

We have to answer this question using recent media articles in order evaluate the effectiveness of legal and non legal methods in balancing between the demands of resources and global environmental protection. We need to incorporate the themes *The impact of state sovereignty and international...

Shadowdude how did you get so lucky!!??

That indicates different people mat have graded you. Or at least some how different standards were applied.

Yes thats true, apparently as long as the course your taking has similar subjects as the degree your interested in as long as you keep your GPA well enough you can transfer into any of them internally without having to start all over again (since yo've been taking the same classes).

No!!

John Fitzpatrick 3U Mathematics 25(c) Question 3 A particle movies in a straight line. At time t seconds, its displacement x cm from a fixed poin O in the line is given by x=5sin((pi/2)T + pi/6). Express the acceleration in terms of x only and hence show that the motion is simple harmonic...

Re: HSC 2012 Marathon :) Lol plox someone help me solve this question, its driving me crazy! John Fitzpatrick 3U Mathematics 25(c) Question 3 A particle movies in a straight line. At time t seconds, its displacement x cm from a fixed poin O in the line is given by x=5sin((pi/2)T + pi/6)...

Re: HSC 2012 Marathon :) yes, btw i tried using x''=-n^2 . x and v^2=n^2 . (a^2 + x^2) My problem with differentiation from the displacement was that i didn't have a value for t

Re: HSC 2012 Marathon :) John Fitzpatrick 3U Mathematics 25(c) Question 3 A particle movies in a straight line. At time t seconds, its displacement x cm from a fixed poin O in the line is given by x=5sin((pi/2)T + pi/6). Express the acceleration in terms of x only and hence show that the...

Re: HSC 2012 Marathon :) Any ideas though?

Re: HSC 2012 Marathon :) Stuck on 3 and 4, i tried using v^2=n^2(a^2+x^2) and -n^2 . x

Re: HSC 2012 Marathon :) Zomg duhr lol i didn't realize i had the displace ment!! ARRHHHHHHHHHH!

Re: HSC 2012 Marathon :) John Fitzpatrick 3U Mathematics 25(c) Question 3 A particle movies in a straight line. At time t seconds, its displacement x cm from a fixed poin O in the line is given by x=5sin((pi/2)T + pi/6). Express the acceleration in terms of x only and hence show that the...

Re: HSC 2012 Marathon :) John Fitzpatrick 3 Unite Mathematics 25(C) A particle is moving in a straight line. If x is its displacement at time t and v^2=5(4-x^2) Find the acceleration in terms of x only, Show that the motion is simple harmonic and find its period and amplitude.

Sweet thanks iampeter, don't wana be a bother. But this thing with 1/2v^2 has really been annoying me. I think i must have missed one of the classes.