A rocket with total mass 3.00 105 kg leaves a launch pad

Chapter 6, Problem 6.21

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A rocket with total mass 3.00 105 kg leaves a launch pad at Cape Kennedy, moving vertically with an acceleration of 36.0 m/s2. If the speed of the exhausted gases is 4.50 103 m/s, at what rate is the rocket initially burning fuel? (a) 3.05 103 kg/s (b) 2.40 103 kg/s (c) 7.50 102 kg/s (d) 1.50 103 kg/s (e) None of these

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