Types of friction: static friction, sliding friction, rolling friction

Factors affecting friction: surface type, weight, roughness

Walking: friction between shoes and ground allows us to walk without slipping

Brakes: friction between brake pads and wheels slows down or stops a vehicle

Gripping: friction between hands and objects helps in holding and manipulating things

Efficiency: reducing friction minimizes energy loss in machines and increases efficiency

Wear and tear: excessive friction can cause damage and wear out surfaces or components

Safety: reducing friction can prevent accidents by providing better control and stability

Lubrication: using oily substances to create a lubricating film between surfaces

Smoothing: polishing or grinding surfaces to reduce roughness and improve smoothness

Streamlining: shaping objects to reduce air resistance and friction with a fluid medium

F: frictional force

μ: coefficient of friction

N: normal force exerted on an object

Sliding a book on a table

Driving a car on a road

Sliding down a playground slide

Using a pencil to write on paper

Rubbing hands together to generate heat