Question

Find the initial acceleration of a rocket if it's initial mass is 40MT.The exhaust velocity of gases is 4km/s and the fuel consumption is 200kg/s.​

Answer 1

Answer:

Relative velocity of exhaust gas V=2 km/s=2000 m/s

Thrust force F

t

=V

dt

dm

=2000×

dt

dm

Acceleration a=4.9 m/s

2

Mass of rocket M=1000 kg

Using Ma=F

t

−Mg

Or 1000×4.9=2000×

dt

dm

−1000×10

⟹

dt

dm

=7.35 kg/s

So, option C is correct.

Answer 2

Answer:

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