PHYSICS · Single correct · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics
Problem
A book of mass 1kg rests on a horizontal table. The book experiences its weight downward and an equal normal reaction upward. The book remains at rest because
(a) the downward weight and the upward normal form an action–reaction pair that cancel each other on the book
(b) the table pushes upward with a force slightly greater than the weight to support the book
(c) the net force on the book is zero although the weight and the normal are not an action–reaction pair
(d) no forces act on the book at rest, as stated by Newton’s first law of motion