A cup of coffee is on a table in an airplane flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and the table is 0.30. Suddenly, the plane accelerates forward, its altitude remaining constant. The maximum acceleration that the plane can have without the cup sliding backwards on the table is 2.94 m/s2. Belgium's HSL-1 train has a top speed of 186 mph. If the train stopped suddenly, how long would it take for a cup of coffee to slide off the table compared to the coffee on the airplane?