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If train A leaves from El Paso at high noon and train B leaves from Dallas at 1 PM, you won't know when they meet unless you master 1D kinematics. What are you waiting for?

In a subway station, there are two escalators going upwards toward the exit. One is broken while the other one is working. If a man walks up the broken escalator, it takes \(54\) seconds for him to leave the station. If he takes the working escalator while standing still, it takes \(28\) seconds for him to leave the station. If this man walks while taking the working escalator, approximately how long will it take for him to leave the station?

Assume that the escalator and man are both move with constant respective velocities.

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Two spaceships initially at rest take off to travel a distance of \(2000\text{ km}.\) One spaceship accelerates uniformly at a rate of \(40 \text{ km/s}^2\), and the second one moves with a constant acceleration of \(10 \text{ km/s}^2.\) How many seconds earlier will the first spaceship reach its destination?

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