3.4 Friction Review

Front

What is friction?

Back

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

Front

In which direction does friction act in relation to movement?

Back

Friction acts in the opposite direction of movement.

Front

What effect do rough surfaces have on friction?

Back

Rough surfaces have greater friction compared to smooth surfaces.

Front

Which surface allows a toy car to travel the furthest?

Back

A toy car will travel furthest on ice.

Front

How can friction be reduced?

Back

Friction can be reduced by: 1) Reducing the force acting between the surfaces, 2) Reducing the roughness of the surfaces, 3) Using lubricants like wax, grease, or oil.

Front

True or False: Smooth surfaces create less friction when rubbed together.

Back

True.

Front

What is the relationship between surface roughness and friction?

Back

Greater surface roughness leads to increased friction.

Front

What are lubricants and how do they affect friction?

Back

Lubricants are substances like oil or grease that reduce friction between surfaces.

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.