A 6.00 Kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.360. Determine the kinetic frictional force that acts on the box when the elevator (a) is stationary (b) accelerating upward with an acceleration whose magnitude is 1.20 m/s squared and (c) accelerating downward with an acceleration whose magnitude is 1.20 m/s squared.
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