A) \[\text{1}\text{.7}\,\,\text{kg/sec}\]
B) \[\text{0}\text{.7}\,\,\text{kg/sec}\]
C) \[\text{2}\text{.7}\,\,\text{kg/sec}\]
D) \[\text{1}\text{.5}\,\,\text{kg/sec}\]
Correct Answer: B
Solution :
Here: Velocity of rocket\[u=300m/s\] Force \[F=210\,\,N\] 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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