Important definations
Momentum :It is measured by mass and velocity
Inertia: property of body to oppose any change in its state of rest
Newton 1 lawc: every body remains i n state of rest unless it composed by external force
2 law: Force acting on an object is proportional to rate change of momentum
3 law :Action &Reaction are same and opposite

Summary of Force and Law of Motion
The chapter on Force and Laws of Motion introduces fundamental concepts that explain how objects interact and move. These principles are essential for understanding mechanics in physics.
Key Concepts
- Definition of Force
- Force is a push or pull acting on an object.
- It has both magnitude and direction.
- Types of Forces
- Contact Forces: Require physical contact (e.g., friction, tension).
- Non-contact Forces: Act at a distance (e.g., gravitational, magnetic).
- Newton's Laws of Motion
- First Law (Inertia): An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.
- Second Law (F=ma): The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
- Third Law (Action-Reaction): For every action, there is an equal and opposite reaction.
Important Topics
- Inertia
- The resistance of any physical object to any change in its velocity.
- Mass and Weight
- Mass is a measure of the amount of matter in an object.
- Weight is the force exerted by gravity on that mass.
- Friction
- A force that opposes the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
- Applications of Newton's Laws
- Understanding real-world situations, such as vehicle motion, sports, and engineering applications.
Conclusion
This chapter provides a foundational understanding of how forces affect motion, laying the groundwork for further studies in physics and engineering. Exploring these concepts through practical examples enhances comprehension and application in everyday scenarios.