Question

A 1500 kg aircraft going 30 m/s collides with a 3000 kg aircraft that is parked...

A 1500 kg aircraft going 30 m/s collides with a 3000 kg aircraft that is parked and they stick together after the collision. If they skid for 157.5 m in 25 s before stopping, how fast were the two stuck-together aircraft going immediately after the collision? Hint: Are the aircraft moving at a constant velocity after the collision or do they experience an acceleration?

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