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4. (6 pts) A constant force of 900 N acts on a spacecraft of mass 9000 kg that has an initial velocity of 29 m/s. How far has the spacecraft traveled when it reaches a velocity of 5000 m/s?
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From Newtons equation of motion, 2 2a 2F (9000kg)(5000 m/s),-(20 m/s)2) 2 (800N) 140622750 m 140622.75 km

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