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A rocket ?ring its engine and accelerating in outer space (no gravity, no air resistance) suddenly...

A rocket ?ring its engine and accelerating in outer space (no gravity, no air resistance) suddenly runs out of fuel. Which of the following best describes its motion after burnout?

       A) It continues to accelerate at the same rate.
       B) It continues to accelerate but at a gradually decreasing rate, until it reaches a constant velocity.
       C) It immediately stops accelerating, and continues moving at the velocity it had when burnout occurred.
       D) It immediately begins slowing down and gradually approaches zero velocity.
       E) It will start falling back to earth.

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