An airport tram carries passengers between two terminal buildings 500 m apart. The tram starts from rest and accelerations at 1.5 m/s^2 for 20 m. It then travels at a constant velocity for 450 m. Finally, it slows down for 30 m at an acceleration of 1 m/s^2 and comes to rest. How long does it take the tram to travel the entire 500 m trip between buildings?
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1009
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