Class8 Science Book Curiosity Chapter5 QA
Chapter 5 – Exploring Forces VERY SHORT ANSWER (1 MARK) – IMPORTANT What is a force? A push or pull acting on an object. What can a force do? It can change shape, speed, direction or state of motion. Name two types of forces. Contact force and non-contact force. What is contact force? Force that acts only when objects touch. What is non-contact force? Force that acts without physical contact. Name one contact force. Friction. Name one non-contact force. Gravitational force. SHORT ANSWER (2 MARKS) – IMPORTANT Define force. Force is a push or pull that can change the shape, motion or direction of an object. What are contact forces? Give examples. Forces that act when objects are in contact. Examples: Friction, muscular force. What are non-contact forces? Give examples. Forces that act without contact. Examples: Gravitational, magnetic force. What is friction? Friction is a force that opposes motion between two surfaces in contact. Why is f...