Friction Review

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 two main factors that determine the amount of friction between two objects?

Back

The two main factors are the force pressing the objects together and the roughness of the surfaces in contact.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

How does surface roughness affect friction?

Back

Rough surfaces have greater friction compared to smoother surfaces.

Front

What happens to friction when sand is poured on an icy road?

Back

Pouring sand on an icy road increases friction, helping cars to stay on the road.

Front

Which surface would a toy car travel the furthest when pushed?

Back

A toy car would travel the furthest on ice due to lower friction.

Front

What is the relationship between force and friction?

Back

The greater the force pressing two surfaces together, the greater the friction between them.

Front

What is 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 can friction be reduced?

Back

Friction can be reduced by using lubricants, smoothing surfaces, or using wheels.