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 (kinetic) friction?

Back

Sliding friction is the force that opposes the motion of two surfaces sliding past each other.

Front

What is rolling friction?

Back

Rolling friction is the force that opposes the motion of an object rolling 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

How does surface roughness affect friction?

Back

Rough surfaces have greater friction compared to smoother surfaces due to increased contact area and interlocking of surface irregularities.

Front

Which material would likely have the most friction: metal, tile, sandpaper, or denim?

Back

Sandpaper would likely have the most friction due to its rough texture.

Front

What happens to friction when the weight of an object increases?

Back

As the weight of an object increases, the frictional force also increases, making it harder to move.

Front

What is the role of lubrication in friction?

Back

Lubrication reduces friction between surfaces by creating a thin layer that minimizes direct contact.