Friction (part-1)
FRICTION Q.1. What is force? Write few of its characteristics. Ans.1. A push or a pull on an object is called a force. Force is a vector quantity (having magnitude as well as direction). S.I. unit of Force is N (Newton). Force can Change the State of Motion. Force can Change the Shape of an Object. s Q.2. What is friction ? Ans.2. The force which opposes the motion of an object on the surface of another object is called force of friction. Force of friction is a contact force. The force of friction always opposes the applied force (direction of motion).