Question

In case of a book lying on table :

• A. action of book and reaction of table on book are equal and opposite and are inclined to vertical
• B. action and reaction are equal but act in the same direction
• C. action and reaction are equal and opposite and act perpendicular to the surface of contact
• D. action and reaction are not equal but act in opposite direction

Answer 1

Answer: (C)

Newtons third law states that if a body exerts a force on a second body, the second body exerts a force that is equal in magnitude and opposite in direction to the first force. The book lying on the table is exerting a downward force on the table while the table is exerting an upward reaction force on the book. Because the forces are equal and Opposite the book remains at rest.