A rocket has a total mass of 112 105 kg and a burnout mass, Ask an Expert

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A rocket has a total mass of 1.12 105 kg and a burnout mass of 1.09 104 kg, including engines, shell and payload. The rocket blasts off from Earth and exhausts all its fuel in 3.99 min, burning the fuel at a steady rate with an exhaust velocity of ve = 4.90 103 m/s.

(a) If air friction and gravity are neglected, what is the speed of the rocket at burnout?

m/s

(b) What thrust does the engine develop at liftoff?

m/s2

(d) Estimate the speed at burnout if gravity isn't neglected.

m/s

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