Home Physics System of Particles Rotational Motion Centre of Mass A 6000 kg rocket is set for vertical firing.…
Physics System of Particles Rotational Motion Centre of Mass MCQ (Single Correct)

A 6000 kg rocket is set for vertical firing. If the exhaust speed is 1000 m/sec. How much gas must be ejected each second to supply the thrust needed to give the rocket an initial upward acceleration of 20 m/sec²- (consider g = 9.8 msec –2 acceleration due to gravity )

A
92.4 kg/sec
B
178.8 kg/sec
C
143.2 kg/sec
D
47.2 kg/sec

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The correct answer is:
B

b

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