motorist is driving at 20 m/s when she sees that a fic light 200 m ahead has just turned red. She ws that this light stays red for 15 s, and she wants each the light just as it turns green again. It takes 1.0 s to step on the brakes and begin slowing. What is her speed as she reaches the light at the instant it turns green? Express your answer with the appropriate units. ?

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