Topic 2.7 Kinetic Friction

Front

What occurs when two surfaces in contact move relative to each other?

Back

Kinetic friction occurs.

Front

In which direction is the kinetic friction force exerted?

Back

Opposite to the motion of each surface relative to the other.

Front

Does the force of friction depend on the size of the surface area of contact?

Back

No, it does not depend on the size of the surface area.

Front

What is the magnitude of the kinetic friction force?

Back

The product of the normal force and the coefficient of kinetic friction.

Front

What does the coefficient of kinetic friction depend on?

Back

The material properties of the surfaces in contact.

Front

What is the normal force?

Back

The perpendicular component of the force exerted on an object by the surface it is in contact with.

Front

What may occur between the contacting surfaces of two objects that are not moving?

Back

Static friction may occur.

Front

What does static friction do?

Back

It adopts the value and direction required to prevent an object from slipping or sliding.

Front

What do slipping and sliding refer to?

Back

Situations in which two surfaces are moving relative to each other.

Front

Is there a maximum value for static friction?

Back

Yes, there exists a maximum value for which static friction will prevent slipping.