Basically i need to find the braking distance and time for the deceleration of a vehicle for the following conditions,
using a parachute
using a parachute, and wheel brakes
does anyone know of a suitable formula to calculate this?
Fd=0.5CdPAu^2 - drag force from parachute
Fw= Constant - brake force at wheels - Ive already calculated this to be in the region of 7000N - though this number is likely to change
The Attempt at a Solution
Basically i have the following differential equation, which im not sure if it is correct, it has also been a very long time since i solved a differential equation:
M d2x/dt^2 + P dx/dt + B = 0 where M is the mass, Fd is the drag force from the parachute and Fw is constant force (brakes.)
if this is correct, how might i go about calculating a stopping distance, and time to stop?