Bonnie and clyde are sliding 450 bank safe across the floor, Ask an Expert

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Bonnie and Clyde are sliding 450 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 440 of force while Bonnie pulls forward on a rope with 200 of force. what is the coefficient of kinetic friction of the bank on the floor?

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