Answer:
The forces acting on the book are balanced by each other.
Explanation:
But what exactly is meant by the phrase unbalanced force?
What is an unbalanced force?
In pursuit of an answer, we will first consider a physics book at rest on a tabletop. There are two forces acting upon the book. One force - the Earth's gravitational pull - exerts a downward force. The other force - the push of the table on the book (sometimes referred to as a normal force) - pushes upward on the book.
Since these two forces are of equal magnitude and in opposite directions, they balance each other. The book is said to be at equilibrium.
