Questions
For a rocket propulsion velocity of exhaust gases relative to rocket is 2 km/s. If mass of rocket system is 1000 kg, then the rate of fuel consumption for a rocket to rise up with acceleration 4.9 m/s2 will be :
detailed solution
Correct option is C
Here,thrust=vdmdt=(2000)dmdt Forrocket, vdmdt=m(g+a)⇒ 2000dmdt=1000(9.8+4.9)⇒ dmdt=7.35kg/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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