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3 points A 1.2 kg rock is thrown through a glass window. It hits the window with a speed of +5.0 m/s and after the window shatters it has a speed of +3.0 m/s. If the glass breaks in 0.002 s, what force did the glass exert on the rock? O -4800 N +4800 N -1200 N None of the above OO +1200 N