Friction

Front

What are the four types of friction?

Back

Sliding, rolling, static, and fluid.

Front

What type of friction do wheels on a skateboard experience?

Back

Rolling friction.

Front

What type of friction slows down the movement of a swimmer?

Back

Fluid friction.

Front

What type of friction occurs when two surfaces slide against each other?

Back

Sliding friction.

Front

How can friction be reduced?

Back

By using lubricants, smoothing surfaces, or using ball bearings.

Front

What is static friction?

Back

The friction that prevents two surfaces from sliding past each other.

Front

What is the difference between static and kinetic friction?

Back

Static friction acts on objects that are not moving, while kinetic (or sliding) friction acts on objects that are in motion.

Front

What is rolling friction?

Back

The resistance encountered when an object rolls over a surface.

Front

What factors affect the amount of friction between two surfaces?

Back

Surface texture, the materials of the surfaces, and the normal force pressing them together.

Front

What is fluid friction?

Back

The resistance experienced by an object moving through a fluid (liquid or gas).