A 0.5-kg object initially resting on a horizontal (frictionless) air track at x = 1 m is subject to two forces: F₁ is a constant force of magnitude 20 N directed vertically downward, while F2 acts along the x-axis and varies as shown in the figure below. The speed (in m/s) of the object after it undergoes a displacement of 5 m along the positive x-direction is: ↑10 F(N) 5 0 -5 -10 LAF 3 45 6 10.0 8.9 107.7 108.9 7.7 The correct answer is: 7,7

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