Friction

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another.

Front

How does friction affect the speed of an object?

Back

More friction decreases the speed of an object.

Front

What happens to friction on rough surfaces compared to smooth surfaces?

Back

Rougher surfaces have greater friction than smoother surfaces.

Front

What is an example of harmful friction?

Back

Engine parts wearing out due to friction is an example of harmful friction.

Front

What is the best way to create heat to start a campfire without matches?

Back

Rubbing two large sticks together is the best way to create heat to start a campfire.

Front

What occurs when two objects rub against each other?

Back

Heat is generated when two objects rub against each other.

Front

What factors affect the amount of friction between two surfaces?

Back

The roughness of the surfaces and the force pressing them together affect the amount of friction.

Front

What is static friction?

Back

Static friction is the friction that exists between a stationary object and the surface it's on.

Front

What is kinetic friction?

Back

Kinetic friction is the friction between moving surfaces.

Front

How can friction be reduced?

Back

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