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A space vehicle is traveling at 4300 km/h relative to earth when the exhausted rocket motor...

A space vehicle is traveling at 4300 km/h relative to earth when the exhausted rocket motor (mass 4m) is disengaged and sent backward with a speed of 82 km/h relative to the command module (mass m).a) What is the speed of the space vehicle after the engine has separated relative to earth? b) What is the speed of the command module relative to earth just after the separtaion.

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