Aerospace Engineering > GATE 2023 > Rocket Propulsion
Two missiles A and B powered by solid rocket motors have identical specific impulse, liftoff mass of 5600 kg each, and burn durations of tA = 30 s and tB = 70 s respectively. The propellant mass flow rates, ṁA and ṁB for missiles A and B, respectively, are given by ṁA = 120 kg/s, 0 ≤ t ≤ 30 and ṁB = 70 kg/s, 0 ≤ t ≤ 70. Neglecting gravity and aerodynamic forces, the relationship between the final velocities VA and VB of missiles A and B, respectively, is given by
Correct : b
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