1.

The rate of mass of the gas emitted from rear of a rocket isinitially 0.1 kg/sec. If the speed of the gas relative to therocket is 50 m/sec and mass of the rocket is 2 kg, then theacceleration of the rocket in m/sec2 is(a) 5 (b) 52 (c) 2.539.(d) 25

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