U4Q3 Frictional Force Flashcard

Front

What happens to the force of friction when an object begins motion?

Back

The force of friction decreases.

Front

What is the relationship between the normal force and the force of friction?

Back

The force of friction is directly proportional to the normal force.

Front

What is the role of the coefficient of friction in the frictional force equation?

Back

The coefficient of friction represents the roughness of the surfaces in contact.

Front

As the angle of the incline increases, what happens to the normal force?

Back

Normal force decreases.

Front

If a frictional force of 200 N acts on a chair with a normal force of 800 N, what is the coefficient of friction?

Back

0.25.

Front

Define frictional force.

Back

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

Front

What factors affect the force of friction?

Back

The nature of the surfaces in contact and the normal force acting on the surfaces.

Front

Explain static friction.

Back

Static friction is the frictional force that prevents two surfaces from sliding past each other.

Front

What is kinetic friction?

Back

Kinetic friction is the frictional force acting between moving surfaces.

Front

How does surface roughness affect friction?

Back

Rougher surfaces generally have higher friction due to increased interlocking of surface irregularities.