Question

the normal reaction on book kept on table is equal to its weight because of which law of Newton
and why ?​

Answer 1

Answer:

Sir Newton's third law of motion states that for an action there is always an equal and opposite reaction . ... When a book is kept on a table , weight (gravitational force) of book acts on table vertically downwards and as a reaction of weight , table also exerts an equal and opposite ( upward) force on book .