(Answered) A 1000-kg aircraft going 25 ms collides with a 1500-kg

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A 1000-kg aircraft going 25 m/s collides with a 1500-kg aircraft that is parked. They stick together after the collision and are moving at 10 m/s. If they skid for 9.7 seconds before stopping, how far (in meters) did they skid?

Hint: Are the aircraft moving at a constant velocity after the collision or do they experience an acceleration?

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