A 13-Kg Booster Attached to a 6-Kg Rocket Is Initially Traveling

A 1.3-kg booster attached to a 6-kg rocket is initially traveling at a speed of 175 m/s.If the booster is ejected in backward direction with speed of 60 m/s relative to the rocket/booster rest frame,how fast will the rocket then travel?

A) 115 m/s
B) 162 m/s
C) 175 m/s
D) 188 m/s
E) 235 m/s

Correct Answer:

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