Question

. During the rocket propulsion, gases are ejecting with
velocity 1 km/s relative to rocket. The rate of fuel
consumption is m /10 kg/s, where m is the instantaneous
mass of the rocket. If air resistance varies according
to equation f = 0.15 mv, then terminal velocity of the
rocket is:
(AIIMS, 2015]
(A) 300 m/s
(B) 600 m/s
(C) 7.92 km/s (D) 11.2 km/s​

Answer 1

Answer:

600m/sec

Explanation:

vdm/dt=mg +f

1000(m/10) =10m+0.15mv

v=600

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