Which of the following is a Newton's third law pair?
AA book pushes down on a table; the table pushes up on the book.
BA book's weight and the normal force on the book.
CThe book's weight only.
DGravity and friction on a moving car.
Explanation
📌 The action-reaction pair acts on DIFFERENT objects. Book pushes table (force on table), table pushes book (force on book) — different objects, equal-and-opposite. Distractor B: both act on the book (equilibrium pair, not action-reaction); C: only one force; D: different forces on same object.