# Question Second order differential equation. I want to convert this second order diff equ to a set of two first order. d^2thata/dt^2 +(g/L)sin(theta) = 0, theta(0)=pi/6, theta'(0)=0 g = 32.17 ft./sec^2, L=2ft Something like this: u1(t) = theta(t) u2(t) = theta'(t) u1'(t) = u2(t) u2'(t) = -16.085*sin(t) ??? not right

Question

# Second order differential equation. I want to convert this second order diff equ to a set of two first

order. d^2thata/dt^2 +(g/L)sin(theta) = 0, theta(0)=pi/6, theta'(0)=0 g = 32.17 ft./sec^2, L=2ft Something like this: u1(t) = theta(t) u2(t) = theta'(t) u1′(t) = u2(t) u2′(t) = -16.085*sin(t) ??? not right

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