Question

You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.)

Answer 1

1.

Answer:

Hand on book

Earth on book

Explanation:

Since we are holding the book so the forces that acts on the book is

1. Hand on book

this is the contact force between hand and the book

2. Earth on book

here this is the gravitational attraction force of earth on the book

2.

Answer:

A. book on hand  - NA

B. hand on book  - upwards

C. floor on book  - NA

D. earth on book - downwards

Explanation:

Since book is holding in hand so at equilibrium position we can say that the forces on the book must be in equilibrium

so first of all the force of attraction due to earth on the book is downwards and this is counterbalanced by the force of hand on book which is upwards.

3.

Answer:

A. book on hand  

Explanation:

As per Newton's III law we know that every action has equal and opposite reaction.

so if our hand apply the force on the book in upward direction then book will apply same magnitude force on the hand in downward direction.