Friction

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

How does friction affect speed?

Back

More friction decreases speed.

Front

True or False: Without friction, an object in motion would never stop.

Back

True.

Front

What happens to a bicycle when the chain is oiled?

Back

Friction on the bike has decreased, making it easier to ride.

Front

What is an example of trying to increase friction?

Back

Spreading sand onto an icy road.

Front

Which of the following is an example of friction that is helpful?

Back

Brakes used on a bike, Tires from a car on the road, Tread on the bottom of your shoes - all are helpful.

Front

What is static friction?

Back

Static friction is the force that keeps an object at rest from moving.

Front

What is kinetic friction?

Back

Kinetic friction is the force that opposes the motion of an object that is already moving.

Front

How can friction be reduced?

Back

Friction can be reduced by using lubricants like oil or grease.

Front

What role does friction play in walking?

Back

Friction between shoes and the ground allows us to walk without slipping.