Caroline is on an airplane. At one point in the flight, she measures that her luggage has an apparent weight of LaTeX: 135 135 N. The actual weight of her luggage is LaTeX: 115 115 N. Which of the following best describes the vertical motion of the airplane? The airplane is accelerating downwards at LaTeX: 21.3 m/sLaTeX: ^2 The airplane is accelerating downwards at LaTeX: 1.71 m/sLaTeX: ^2 The airplane is accelerating upwards at LaTeX: 21.3 m/sLaTeX: ^2 The airplane is accelerating upwards at LaTeX: 1.71 m/sLaTeX: ^2