Ever give any thought to friction? most people would say its a negative thing because it transfers other types of energy into thermal energy and cause things like rug burn. However friction is what allows us to do all the things we do, like walking without friction you would literally never be able to go anywhere. This is because there is friction between your shoes and the ground you push backward and move forward (**cough** all forces come in pairs of equal magnitude and opposite direction ***cough**) the friction between you create these forces allows for movement. How? well surfaces aren't exactly smooth they are rough and the low and high spots on the surfaces rub an cause friction and allow one to move off another if a force is applied to it Thanks to friction we can walk, drive and do all the fun stuff we do on a daily basis.