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The rate of burning of fuel in a rocket is 50g/s and comes out with velocity 4000 m/s.The force exerted by gas on rocket will be
a.200 N
b.250 N
c.2500000 N
d.25000 N
FORCE EXERTED = CHANGE IN MOMENTUM / TIME
rate of burning fuel = 50g/s = 50/1000 kg/s
so F= (50 X 4000) / 1000 = 200
Ans a.200N
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