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Normal force is exerted _____to the surface of an object. A. perpendicular B. 45 degrees C. horizontal


Option A is the correct choice. Explanation: In the field of Physics, the normal force represents the part of a contact force that acts at a right angle to the surface with which an object is in contact. It is the force that supports an object that is interacting with another stable object. The normal force is always directed opposite to the force applied on the surface. For instance, if a book is placed on a surface, the surface would exert an upward force on the book so as to balance its weight.