friction

Front

Friction is a force that acts in an ___________ direction of movement.

Back

opposite

Front

Does the amount of friction depend on the weight of the objects pressing together?

Back

True

Front

How can friction be reduced?

Back

All of the above are ways of reducing friction: reduce the force acting between the 2 surfaces, reduce the roughness of the 2 surfaces coming in contact, use wax, grease or oil.

Front

A type of friction that occurs when air pushes against a moving object causing it to decelerate.

Back

air resistance

Front

Rougher surfaces have ...

Back

greater friction

Front

How does friction affect speed?

Back

More friction decreases speed.

Front

Without friction, an object in motion would never stop.

Back

True

Front

You can walk because there is friction between your __________ and ______________

Back

feet and ground

Front

Does friction help you write on a paper or blackboard?

Back

True

Front

Examples of lubricants: oil, grease, powder

Back

all of the above