Can someone help me with ODE45 function

I have the differential equation in the attached pdf. I would like to change into state variable form so I can use ODE45 to numrically integerate it, but I don't know how to do it. I hope someone can help me.

Answer 1

[Star Strider]

I read it diferently:

f = @(t,v) (489.369-0.001464*v^2)/(-1.44*t+10) - 9.81

[Walter Roberson]

Ah, that looks plausible.

Answer 2

[Walter Roberson]

f = @(t,v) (489.369-0.001464*v^2)/-1.44e+10 - 9.81
ode45(f, tspan, v0)

[Ali Almakhmari]

Thanks too. That really helped.