Understanding the Concepts
* Newton's First Law: An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
* Friction: A force that opposes motion between two surfaces in contact.
* Balanced Forces: When forces acting on an object are equal in magnitude and opposite in direction, they cancel each other out, resulting in no change in the object's motion.
Applying the Concepts to the Book
1. Horizontal Push: You are applying a 1 N force horizontally.
2. Constant Velocity: Since the book moves at a constant velocity, the net force on it must be zero.
3. Friction Opposing Motion: The only force acting against your push is friction.
4. Balanced Forces: For the book to move at constant velocity, the friction force must be equal in magnitude and opposite in direction to your 1 N push.
Conclusion
Therefore, the friction force acting on the book is 1 N.
