Friction Flashcard

Front

What is friction?

Back

Friction is the force that opposes the relative motion of two surfaces in contact.

Front

What are the two main types of friction?

Back

The two main types of friction are static friction (when an object is at rest) and kinetic friction (when an object is in motion).

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 kinetic friction?

Back

Kinetic friction is the force that opposes the motion of an object that is already moving.

Front

What is the normal force?

Back

The normal force is the force exerted by a surface that supports the weight of an object resting on it.

Front

How does surface roughness affect friction?

Back

Rougher surfaces generally produce more friction than smoother surfaces due to increased interlocking of surface irregularities.

Front

What is the coefficient of friction?

Back

The coefficient of friction is a numerical value that represents the frictional force between two surfaces in contact.

Front

What is the difference between static and kinetic friction coefficients?

Back

The coefficient of static friction is usually higher than the coefficient of kinetic friction, meaning it takes more force to start moving an object than to keep it moving.

Front

What is rolling friction?

Back

Rolling friction is the force that opposes the motion of a rolling object, typically less than sliding friction.

Front

What is fluid friction?

Back

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