A 600 kg rocket is set for a vertical firing. If the exhaust

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A 600 kg rocket is set for a vertical firing. If the exhaust speed is 1000 ms^–1 , the mass of the gas ejected per second to supply the thrust needed to overcome the weight of rocket is

1. 117.6 kg s^–1
2. 58.6 kg s^–1
3. 6 kg s^–1
4. 76.4 kg s^–1

Correct Option: C

Thrust -	udM	= mg ⇒	dM	=	mg
	dt		dt		u

=	600 × 10	= 6 kgs^-1
	1000