15,000 2,400,000 QUESTION 10 A spacecraft is being launched using a three-stage rocket, with the performance parameters given in table Q10 below. Spacecraft mass First stage wet mass Table Q10 Three stage launcher parameters kg kg First stage mass fraction 15 First stage specifc impulse Second stage wet mass Second stage mass fraction Second stage specifc impulse Third stage wet mass Third stage mass fraction 256 m/s 450,000 kg 10 417 m/s 150,000 kg 8 Third stage specifc impulse 424 m/s Assuming a vertical launch in the absence of gravity, and neglecting atmospheric drag, what is the final velocity of the spacecraft? Enter only the numerical part of your answer in the box below, in m/s to the nearest integer.