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

What happens when there is less friction?

Back

Less friction allows objects to move faster.

Front

How can you create heat with your hands in cold weather?

Back

You can create heat by rubbing your hands together.

Front

In which example is friction helpful?

Back

Friction is helpful when brakes stop a car.

Front

What do you need friction for when walking?

Back

You need friction between your feet and the ground to walk.

Front

What would happen without friction?

Back

Without friction, an object in motion would never stop.

Front

What is static friction?

Back

Static friction is the force that keeps an object at rest and prevents it 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

Can friction be both helpful and harmful?

Back

Yes, friction can be helpful (like stopping a car) or harmful (like causing wear on engine parts).