Friction GRADE 4

Friction ________ the motion of an object.

• works on the same direction of

• has no effect on

• supports

• opposes

It is an example of which force ?

• Mechanical Force

• Gravitational Force

• Frictional Force

• Muscular Force

True or False: objects that are smooth have LESS friction than objects that are rough

• True

• False

______ is used to reduce friction between surfaces

Friction produces a lot of heat that may __________ machine parts.

The rougher the surface, ___ is the friction

• more

• less

• there is no

_________ shape of vehicles helps to reduce friction due to air

_________ is produced due to friction.

Which is not the harmful effect of friction?

• causes wear and tear of tyres

• heat that damage vehicles

• make it difficult for heavy objects to move

• helps in walking

Which of these materials do you predict would have the MOST amount of friction?

• Sand paper

• Denim

• Tiles

• Metal