Question

Which statement explains why a book resting on a table is in equilibrium?

A) There is a net force acting downward on the book.
B) The weight of the book equals the weight of the table.
C) The acceleration due to gravity is 9.8 m/s2 for both the book and the table.
D) The weight of the book and the table's upward force on the book are equal in
magnitude, but opposite in direction.

Answer 1

Option ( d ) is correct because when the force applied is equal and acts on opposite direction the body remains at equilibrium

#BAL

#Answerwithquality

Answer 2

Option D is correct answer.

Step-by-step explanation:

When a book is lying on the table then in that case the total weight of the book is equal to the net upward reaction on the book. so the net force on the book is zero. so book is stationary on the table.

Let have a look on FBD of the book shown in the figure.

Weight of the book = W

Upward reaction on the book = $R_{N}$

For equilibrium of the book,

Weight of the book = Upward reaction on the book

⇒ W = $R_{N}$

The direction of these two forces is opposite to each other.

This is the condition for the equilibrium of the book.

Thus option D is correct answer of this question.