Understanding Friction and Its Types

Front

What is friction?

Back

Friction is the force that opposes the motion of two surfaces that are in contact with each other.

Front

What is static friction?

Back

Static friction is the friction that prevents an object from starting to move when a force is applied.

Front

Give an example of static friction.

Back

An example of static friction is trying to push a heavy box across the floor; the box doesn’t move until enough force is applied to overcome static friction.

Front

What is kinetic (or sliding) friction?

Back

Kinetic friction is the friction that occurs when two objects slide against each other.

Front

Give an example of kinetic friction.

Back

An example of kinetic friction is sliding down a slide at the playground.

Front

What is rolling friction?

Back

Rolling friction is the friction that occurs when an object rolls over a surface.

Front

Give an example of rolling friction.

Back

An example of rolling friction is the friction between bicycle tires and the road.

Front

What is fluid friction?

Back

Fluid friction is the friction that occurs when an object moves through a fluid (liquid or gas).

Front

Give an example of fluid friction.

Back

An example of fluid friction is a swimmer moving through water.

Front

What are the four types of friction?

Back

The four types of friction are static friction, kinetic friction, rolling friction, and fluid friction.