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Subject: Physics Year: IGCSE Level Course: IGCSE Physics Curriculum Author: Omar Ahmed Saifulnasr Description: This document provides a comprehensive overview of Newton's Laws of Motion, which are fundamental principles in classical mechanics. The content is structured to facilitate understanding for IGCSE students, featuring clear definitions, mathematical formulations, and real-life examples. The document serves as a valuable study resource, aiding learners in grasping the concepts of inertia, acceleration, and the action-reaction principle. Ideal for students preparing for their IGCSE examinations, this resource not only enhances theoretical knowledge but also supports practical applications in various physics problems.

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2024/2025

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Download Newton's Laws of Motion and more Study notes Physics in PDF only on Docsity! Newton's Laws of Motion Introduction Newton's Laws of Motion are three physical laws that form the foundation for classical mechanics. They describe the relationship between the motion of an object and the forces acting upon it. Sir Isaac Newton formulated these laws in the 17th century, and they are crucial for understanding how objects move in our universe. First Law: Law of Inertia The first law states that an object at rest will remain at rest, and an object in motion will remain in motion with a constant velocity unless acted upon by a net external force. This property of an object to resist changes in its state of motion is known as inertia. Example: A book lying on a table will not move unless someone pushes it. Similarly, a hockey puck sliding on ice will continue to move in a straight line at a constant speed until friction or another force stops it. Second Law: Law of Acceleration The second law establishes a relationship between force, mass, and acceleration, expressed by the formula: F = ma where: - F is the net force acting on the object (in newtons, N) - m is the mass of the object (in kilograms, kg) - a is the acceleration produced (in meters per second squared, m/s²) This law implies that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Example: If a 10 kg object is acted upon by a net force of 20 N, the acceleration can be calculated as: a = F/m = 20 N / 10 kg = 2 m/s² Third Law: Action and Reaction The third law states that for every action, there is an equal and opposite reaction. This means that forces always occur in pairs. When one object exerts a force on another, the second object exerts an equal force in the opposite direction on the first object. Example: When you jump off a small boat, you push down on the boat (action), and the boat pushes you up into the air (reaction), causing the boat to move backward.