A 50.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300 and the coefficient of kinetic friction is 0.200.  A. What is the friction force on the box if a horizontal 140-N push is applied to it? If it moves, what is its acceleration? B. What is the friction force on the box if a horizontal 175-N push is applied to it? If it moves, what is its acceleration?

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