26 TU: 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 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 is the force that opposes the motion of an object sliding over a surface.

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

Example of static friction?

Back

A book resting on a table is held in place by static friction.

Front

Example of sliding friction?

Back

A sled sliding down a snowy hill experiences sliding friction.

Front

Example of rolling friction?

Back

A skateboard rolling on the ground experiences rolling friction.

Front

Example of fluid friction?

Back

A fish swimming through water experiences fluid friction.