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26. At a certain instant of time the mass of a rocket going up vertically is 100 kg. If it is ejecting 5 kg of gas per second at a speed of 400 m/s, the acceleration of the rocket would be (taking   g = 10 m/s ^2

(a)   20m/s 2                                      (b) 10m/s 2

(c)  2 m/s  2                            (d) 1 m/s 2

Ans. b

(23)

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