Questions
A 5000 kg rocket is set for vertical firing. The exhaust speed is 800 . To give an initial upward
acceleration of 20 , the amount of gas ejected per second to supply the needed thrust will be (Take,
9 = 10 )
detailed solution
Correct option is B
F=udmdt=m(g+a)⇒ dmdt=m(g+a)u=5000×(10+20)800=187.5kgs-1Talk to our academic expert!
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Statement II : The equality of mg and R has no connection with the third law.
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