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A two-stage rocket moves in space at a constant velocity of 5100 m/s. The two stages...

A two-stage rocket moves in space at a constant velocity of 5100 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1230-kg upper stage is 5600 m/s in the same direction as before the explosion. What is the velocity (magnitude and direction) of the 2420-kg lower stage after the explosion?

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