Friction

Which force below describes friction?

• 
• 
• 
• 

Friction opposes the ______ between the surfaces in contact with each other

Which of these is an example of friction being useful?

• Friction helps us grip, like rubber tires on the road.

• Friction makes things less efficient.

• Friction slows things down: it can make motors turn more slowly.

• Friction wears away surfaces like the soles of our shoes.

Rubber is a surface with ____ friction.

• High

• Low

A class are doing an experiment to investigate friction in shoe soles. They test these shoes: Which shoe will have the least friction?

• B

• A

• C

• D

A class are carrying out an experiment to investigate friction on different surfaces.

Which surface will have the most friction?

• Carpet

• Wood

• Rubber

• Tile

Friction depends on the ______ of surfaces.

• pascals

• material

• roughness

• smoothness

Friction produces ______

• electricity

• coldness

• heat

• air

The sprinkling of powder on the carrom board _______ friction.

• creates

• increases

• reduces

• generates

Sliding friction is _______ than the static friction

• less

• more

• within

• heavier