A rocket has a mass of 21000 kg of which 15000 kg is fuel. The rocket engine can exhaust fuel at the rest of 190 kg/s ….

Q: A rocket has a mass of 21000 kg of which 15000 kg is fuel. The rocket engine can exhaust fuel at the rest of 190 kg/s with an exhaust velocity 2500 m/s relative to the rocket. If the rocket is fired vertically upward, its final velocity at the burn out is (in ms-1)

(a) 2735

(b) 2935

(c) 2535

(d) 1975

Click to See Answer :
Ans: (a)