Questions
During the rocket propulsion, gases ejecting with velocity 1 km/s relative to rocket. The rate of fuel consumption is ,where m is the instantaneous mass of the rocket. If air resistance varies according to equation f - 0.15 mv, then terminal velocity of the rocket is :
detailed solution
Correct option is B
At terminal velocity Fnet = 0vgasdmdt=mg+f⇒1000m10=10m+0.15mv⇒v=600m/sTalk to our academic expert!
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Statement I : The familiar equation mg = R for a body on a table is true only if the body is in equilibrium.
Statement II : The equality of mg and R has no connection with the third law.
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