Introduction:
Normal force is a fundamental concept in physics that is often encountered by students in their class 8 curriculum. Understanding what normal force is and how it works is essential for grasping various other concepts in mechanics. In this article, we will delve into the definition of normal force, its significance, and practical examples to help class 8 students gain a better understanding of this concept.

Definition of Normal Force:
Normal force is the force exerted by a surface that supports an object in contact with it. When an object is placed on a surface, the surface exerts an equal and opposite force on the object perpendicular to the surface. This force is known as the normal force. In simpler terms, normal force prevents objects from passing through solid surfaces by pushing back with an equal and opposite force.

Significance of Normal Force:
Normal force plays a crucial role in determining the stability of objects on surfaces. For example, when you place a book on a table, the normal force exerted by the table supports the weight of the book and prevents it from falling through the table. Understanding normal force is also essential in analyzing situations involving inclined planes, friction, and equilibrium of objects.

Practical Examples of Normal Force:
To better understand normal force, let's consider a few practical examples. When you sit on a chair, the chair exerts a normal force equal to your weight, supporting you against the force of gravity. Similarly, when a car is parked on a flat road, the normal force exerted by the road balances the gravitational force acting on the car, keeping it stationary. These examples illustrate how normal force is present in our daily lives and interactions with objects in our environment.

Conclusion:
In conclusion, normal force is a fundamental concept in physics that class 8 students need to grasp to understand various mechanical phenomena. By defining normal force, highlighting its significance, and providing practical examples, students can enhance their comprehension and application of this concept. Encouraging students to explore real-world scenarios involving normal force can further deepen their understanding and appreciation of its role in the physical world.