A ==Key Stage 2=====Meaning==='''Friction''' is a [[force]] that slows things down when two [[Surface|surfaces]] are touching each other.: Singular [[Noun]]: '''Friction''': Plural [[Noun]]: '''Friction''' ===About Friction===: Friction can only happen when two surfaces are touching so it is called a "[[Contact Force]]".: Friction depends on the [[texture]] of a surface.: The rougher a surface is, the more '''friction''' an object will experience when it is moving.: The smoother a surface is, the less '''friction''' an object will experience.: A surface could be described as high '''friction''' or low '''friction'''.