second-order, nonlinear, coupled differential equations

[damianmilan]

I need to solve these second-order, nonlinear, coupled differential equations:


d^2x/dt^2 = -kv(t)dx/dt
d^2y/dt^2 = -g - kv(t)dy/dt

where v, y ,t and x are variables.



.... what i know is, at t=0 :
x=0, y=0.4
at t= final :
x=11.885, y=0.92, dy/dt=0

thanks damian

 

[Deleted member 4993]

I need to solve these second-order, nonlinear, coupled differential equations:


d^2x/dt^2 = -kv(t)dx/dt
d^2y/dt^2 = -g - kv(t)dy/dt

where v, y ,t and x are variables.



.... what i know is, at t=0 :
x=0, y=0.4
at t= final :
x=11.885, y=0.92, dy/dt=0

thanks damian

Without further information (not disclosed in the post) these functions are neither non-linear nor coupled.

Please share your work with us, indicating exactly where you are stuck - so that we may know where to begin to help you.