A constant horizontal force F = 200 N is applied for a time 0.1 s by a kick to a soccer ball of mass m=0.4 kg. If the ball was initially traveling toward the player at 20 m/s, what is the speed as it leaves her foot traveling in the opposite direction?  Choose the correct answer. 50 m/s 20 m/s 10 m/s 30 m/s 70 m/s

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