Question

A rocket of initial mass 4500 kg ejects mass at a constant
rate of 18 kg/s with constant relative speed of 11 km/s. What
is the acceleration of the rocket one minute after blast?
rocure at ground​

Answer 1

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vr =11km/s=11000m/s

Thrust force on rocket is F=vr ×dm/dt

F=11000×16=17600N

Mass of rocket after one minute

M=6000−16×60=5040kg

Acceleration of rocket is a

= F/M

= 17600/5040

=34.92m/s²

Answer 2

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vr =11km/s=11000m/s

Thrust force on rocket is F=vr ×dm/dt

F=11000×16=17600N

Mass of rocket after one minute

M=6000−16×60=5040kg

Acceleration of rocket is a

= F/M

= 17600/5040

=34.92m/s²