A Box Is Pushed Across a Horizontal Table at a Constant

question 23

Multiple Choice

A box is pushed across a horizontal table at a constant speed. Of the forces acting, which pair do we know are equal in magnitude because of Newton's third law?

• A) The normal force on the box and the weight of the box.
• B) The normal force on the box and the normal force on the table from the box.
• C) The force of kinetic friction on the box and the external pushing force applied to the box.
• D) None of these are interaction pairs.

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