Question

A book placed on a table is at rest. Is the force of friction acting on it or not? Explain?

Answer 1

When a book is placed on the flat surface of a table, the frictional force acting between the surfaces of the table and the book is active.

This frictional force is responsible for holding the book in place, exactly where it was kept. In the absence of this force, the book would have simply slipped out of the table.

This frictional force is present in all types of smooth and rough surfaces that bind one surface to another.

Answer 2

Answer:

Answer:The forces acting on the book are - 1) the gravitational pull of the earth.

2) Reactant force from the table.

Explanation:1) the first point is true because gravitational pull of earth acts on each and every object on its surface.

2) the second point is true because gravitational pull of earth acts perpendicularly , thus, exerting force downwards. According to Newton's third law of motion, every action has an equal and opposite reaction,i.e, the reactant force from the table.