A) 1.7 kg/sec
B) 0.7 kg/sec
C) 2.7 kg/sec
D) 1.5 kg/sec
Correct Answer: B
Solution :
Here: Velocity of rocket \[u=300\text{ }m/s\] Force \[F=210N\] The force, \[F=u\left( \frac{dm}{dt} \right)\] Or \[\frac{dm}{dt}=\frac{F}{u}=\frac{210}{300}=0.7\,kg\sec \]You need to login to perform this action.
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