Josephine Cialfi

What is friction?

Friction is the resistance that an object or surface has when it moves or rubs on another object or surface.

Common Example

Rubbing your hands together - Two objects (your hands) are rubbing against each other creating heat, energy, and friction.

Helpful Friction

Basketball Shoes - The friction between the basketball shoes and gym floor keeps a player from sliding because of the rubber of the shoes.

How is it helpful? - Prevents a player from sliding on the gym floor and will help them make the shot

Unhelpful Friction

Race Cars - Tires on a race car needs to be replaced often due to drifting and fast braking because of friction between the car's tires and the track.

How is it not helpful? - It causes the tires to wear out faster which will lead to more money being spent on them