MCAT Question of the Day
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    Q:

    		 Three books are at rest on a table in "pyramid fashion" (largest book on the bottom, medium in the middle, and smallest on top). The bottom book has a weight of 5 N, the middle book has a weight of 4 N, and the top book has a weight of 3 N. Which of the following correctly describes the force acting on the middle book?
    		 

    A

    		 7 N force facing downward

    B

    		 3 N force facing downward

    C

    		 4 N force facing upward

    D

    		 0 N



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