Question

A book is sliding across a horizontal tabletop. As it slides, slows down. Which of the following statements best explains this situation?

There is a balanced force on the book caused by gravity.

There is no upward force acting on the book.

There is an unbalanced force on the book caused by friction.

There are no unbalanced forces acting on the book.

Answer 1

Answer:

There is an unbalanced force on the book caused by friction.

Explanation:

when solid slides on solid (excluding balls) it creates friction.

Answer 2

There is an unbalanced force on the book caused by friction.
If there was no friction, the book would continue to slide.