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49.A 1000kg r...

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49.A 1000kg rocket is fired from the surface of earth so that its exhaust speed is 1000m/s relative to the rocket. If initial acceleration of the rocket is 5m/s2 then mass of fuel burning per second is (a) 15kg/s (b) 5kg/s (c) 10kg/s (d) 20kg/s

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