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Reaction force on a book resting on top of a table.

  1. Oct 1, 2006 #1
    Question:

    A book is resting on top of a table.

    1. Do the downward force of gravity and the upward force of normal force constitute a 3rd law pair? (Yes/No)

    2. The reaction to the force of gravity is exerted on the (earth/table/book) by the (earth/table/book). Its direction is (upward/downward).





    According to Newton's third law, I know that reaction force occurs when object A receiving an impact from object B exerts a force equal in magnitute but opposite in direction to object B.
    But how do you show this on free body diagram?



    Thank you.
     
  2. jcsd
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