Question

a book is dropped and falls to the floor. which of the following describes the forces between the book and the floor when the book hits the floor?
the book exerts a force on the floor, but the floor does not exert a force on the book.
the book does not exert a force on the floor, but the floor exerts a force on the book.
the force exerted by the book on the floor is greater in magnitude than the force exerted by the floor on the book.
the force exerted by the book on the floor is equal in magnitude to the force exerted by the floor on the book

Explanation:

According to Newton's third law of motion, when two objects interact, the forces they exert on each other are equal in magnitude and opposite in direction. In this case, the book and the floor are the two interacting objects. So, the force exerted by the book on the floor and the force exerted by the floor on the book are an action - reaction pair.

Answer:

D. The force exerted by the book on the floor is equal in magnitude to the force exerted by the floor on the book.