Best Handwritten notes Class 9th Science Physics ch2

Some main points about force and laws of motion in class 9 science include: Force: An effort that can change an object's motion, direction, or shape. Inertia: The tendency of an object to remain at rest or in motion unless an external force acts on it. The mass of an object is a measure of its inertia. Unbalanced forces: Forces that do not cancel each other out, resulting in a net force that can change an object's motion. Balanced forces: Forces that cancel each other out, resulting in no net force acting on an object. Friction: The force that opposes relative motion between two surfaces in contact. Newton's laws of motion: First law: An object will remain at rest or in motion unless an external force acts on it. Second law: The force on an object is equal to its mass times its acceleration. Third law: When two objects interact, they apply forces to each other of equal magnitude and opposite direction.