A box with a mass of 5 kg sits on a flat table. The Earth pulls on this object with force equal to the weight of the object (49N).    If this is the action force, what is the reaction force?   The table pushing down on the floor with force of 49N.      The box pushing down on the table with force of 49N.      The normal force pushing up on the box with force of 49N.      The box pulling upward on the Earth with force 49N

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