This makes their surfaces more slippery and so reduces friction. I hope that you will be able to remember most of the facts on this page, but you must memorise the definition of a balanced diet. Write it on a small index card. Put the red words on one side of the card and the blue ones on the other. Add the card to your revision pack.
Friction is the force between to surfaces rubbing together.
It is high if the surfaces are dry and rough and it is low if the surfaces are smooth and wet. Copyright 1999 - 2000 Gondar Design. All Rights Reserved.