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).What is the speed of the command module relative to Earth just after the separation?

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
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Chapter8: Momentum And Collisions
Section: Chapter Questions
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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).What is the speed of the command module relative
to Earth just after the separation?

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