A 600kg rocket is set for a vertical firing. If the exhaust speed is 1000m/s, the mass of the gas ejected per second to supply the thrust needed to overcome the weight of rocket is
5.86 kg/s
76.4 kg/s
6 kg/s
117.6 kg/s
A
76.4 kg/s
B
6 kg/s
C
117.6 kg/s
D
5.86 kg/s
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