Recent content by Tzabcan

If i have 3y" - 2y' -y = 14 + e2x+8x And i want to find the general solution. Obviously first i obtain the characteristic eqn, yc, by making it into a homogeneous eqn. Then i can get yp BUT Am i able to get yp for the e2x and the 14 + 8x separately, then add them together for yp?Thanks

Oh haha, should've put it into the calculator and see for myself. Thanks :)

Well, what we have been given is ω = 2.5 x 10^3 s A = 1.8mm Φ = π/2 I'm just confused how I'm supposed to be using this equation. Do i quite literally just do: 0.0018m * (2.5 x 10^3)^2 sin (π/2 +π) ? And then take the inside to be sin (270)...

Homework Statement To work out the intial acceleration, do we just use the equation: So at t = 0 We eliminate the wt inside the bracket, and are left with Aω^(2)sin(Φ + π) Homework EquationsThe Attempt at a Solution The part which I'm not so sure on, is if i have values for Φ, do i...

Ah ok, thanks. Yeah it's confusing >.<

Homework Statement Calculate the magnitude and direction of the velocity of the rubber duck the second it lands? Homework EquationsThe Attempt at a Solution I'm confused, surely if it has landed then it has no magnitude or direction? as the object is now stationary.

Ah! Wow I'm so dumb haha, 3 hours sleep :D lol. Thanks a lot.

I have this basic differential equation du/dt=(u^2)*(sin t) This is obviously a separable diff eq. So what I've done is: g(t) = sin t h(u) = u^2 1/(u^2) du = sin t dt Integrating both side... 1/y = - cos t + c therefor y = - 1/(cos t + c)Which is wrong, there isn't supposed...

Oh ok, thank you :)

So, I have the matrix: A = -1 -3 3 9 Eigenvalues i calculated to be λ = 8 and 0 Now when i calculate the Eigenvector for λ = 8, i get the answer -1 3 Then when solve for...