A rocket has a mass of 21000 kg of which is fuel. The rocket engine can exhaust fuel at the rate of 190 kg s^(-1) withan exhaust velocity 2500 ms^(-1) relative to the rocket. If the rocket is fired vertically upwards, its final velocity at the burn out is (in ms^(-1)) [given ln (3.5) = 1.253]

A rocket has a mass of 21000 kg of which is fuel. The rocket engine ca

1.	A rocket has a mass of 21000 kg of which is fuel. The rocket engine can exhaust fuel at the rate of 190 kg s^(-1) withan exhaust velocity 2500 ms^(-1) relative to the rocket. If the rocket is fired vertically upwards, its final velocity at the burn out is (in ms^(-1)) [given ln (3.5) = 1.253]
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