Laws Of Motion Question 280

Question: A 600 kg rocket is set for a vertical firing. If the exhaust speed is 1000ms1 , the mass of the gas ejected per second to supply the thrust needed to overcome the weight of rocket is

Options:

A) [117.6 kgs1]

B) [58.6 kgs1]

C) [6 kgs1]

D) [76.4 kgs1]

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Thrust =udMdt=mg

dMdt=mgu=600×101000=6 kgs1



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