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Q.

A rocket of mass 50 kg is fired vertically on the surface of earth. If velocity of exhaust gases relative to the rocket is 200 m/s and fuel is consumed at the rate of 4 kg/s, acceleration of the rocket is

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a

0.8 m/s2

b

1.5 m/s2

c

4 m/s2

d

6 m/s2

answer is D.

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Detailed Solution

Acceleration =Thrust - WeightMass=4×200−50×1050m/s2=6 m/s2
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