Friction

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What are the four main types of friction?

Back

The four main types of friction are static friction, sliding (kinetic) friction, rolling friction, and fluid friction.

Front

What is static friction?

Back

Static friction is the force that keeps an object at rest and prevents it from starting to move.

Front

What is sliding friction?

Back

Sliding friction, also known as kinetic friction, occurs when two surfaces slide against each other.

Front

What is rolling friction?

Back

Rolling friction is the force that opposes the motion of an object that rolls over a surface.

Front

What is fluid friction?

Back

Fluid friction is the resistance encountered by an object moving through a fluid (liquid or gas).

Front

What type of friction do bike wheels experience?

Back

Bike wheels experience rolling friction.

Front

What type of friction do parachutes experience?

Back

Parachutes experience fluid friction.

Front

Give an example of sliding friction.

Back

An example of sliding friction is a kid moving down a slide.

Front

What happens to friction when surfaces are rough?

Back

When surfaces are rough, friction increases, making it harder for objects to slide over each other.