A) 3.5 kg/sec
B) 2.1 kg/sec
C) 1.4 kg/sec
D) 0.7 kg/sec
Correct Answer: D
Solution :
Velocity of rocket \[u=300\text{ }m/s,\] Force F = 210 N The relation of force is given by \[F=u\left( \frac{dm}{dt} \right)\] or \[\frac{dm}{dt}=\frac{F}{u}=\frac{210}{300}=0.7\,\text{kg/sec}\]You need to login to perform this action.
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