Question

A book is lying on a table, there was a gravitational force mg, that's why the book is lying on a table, the force of book lying on a table is reaction force r, explain this statement in detail..

Answer 1

Here The pressure exerted by the book on the table through its weight is action

Here action = weight = mg.

AndNormal force is also there which is a equal force applied by the table and is reaction.

here normal force = mg.

Hence Net force = mg - mg = 0

As reaction &action force are equal, the book lies on the table