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27. A rocket of mass 5700 kg ejects mass at a.constant rate of 15 kg/s with constant speed of12 km/s. The acceleration of the rocket 1 minuteafter the blast is (g 10 m/s2)(1) 34.9 m/s2(3) 3.50 m/s2(2) 27.5 m/s2(4) 13.5 m/s2

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