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A space vehicle is traveling at 5400 km/h relative to the Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 71...

A space vehicle is traveling at 5400 km/h relative to the Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 71 km/h relative to the command module. The mass of the motor is four times the mass of the module. What is the speed of the command module relative to Earth just after the separation?

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