For the rocket of Prob. 14.94, determine (a) the altitude at which all of the fuel has been consumed, (b) the velocity of the rocket at this time.
Prob. 14.94A rocket has a mass of 1200 kg, including 1000 kg of fuel, which is consumed at a rate of 12.5 kg/s and ejected with a relative velocity of 4000 m/s. Knowing that the rocket is fired vertically from the ground, determine its acceleration (a) as it is fired, (b) as the last particle of fuel is being consumed