π Physics Notes: Laws of Motion (Class 9 & 10 Easy Revision)
π· What are Newton’s Laws of Motion? Sir Isaac Newton gave three laws of motion that explain how objects move. ✅ 1. First Law (Law of Inertia) π Statement: An object stays at rest or keeps moving in a straight line unless an external force acts on it. ✔️ Easy Meaning: If you don’t push or pull something, it will stay where it is or keep moving the same way. ✔️ Example: A book on a table stays there until someone lifts it. ✅ 2. Second Law (Law of Force and Acceleration) π Statement: Force = mass × acceleration (F = m × a) ✔️ Easy Meaning: If you apply more force to an object, it accelerates more. Heavy objects need more force to move. ✔️ Example: Pushing an empty cart is easier than pushing a full cart. ✅ 3. Third Law (Action-Reaction Law) π Statement: For every action, there is an equal and opposite reaction. ✔️ Easy Meaning: If you push something, it pushes back with equal force in the opposite direction. ✔️ Example: When you jump off a boat, the boa...