a book is sitting on a desk. what best describes the normal force acting on the book? the upward force the…

a book is sitting on a desk. what best describes the normal force acting on the book? the upward force the desk pushes on the book the upward force the book pulls on the earth the downward force the book pushes on the desk the downward force the earth pulls on the book

a book is sitting on a desk. what best describes the normal force acting on the book? the upward force the desk pushes on the book the upward force the book pulls on the earth the downward force the book pushes on the desk the downward force the earth pulls on the book

Answer

Brief Explanations:

The normal force is a contact - force perpendicular to the surface. When a book is on a desk, the desk exerts an upward force on the book to counteract the gravitational force pulling the book downwards. This upward force from the desk on the book is the normal force.

Answer:

the upward force the desk pushes on the book