1 The force of friction affects the speed at which spacecraft can re-enter the earth's atmosphere.
2 When you rub your hands together the friction produces heat.
3 A detonator is any device containing an explosive that is actuated by heat, percussion, friction, or electricity.
4 Having my mother living with us causes friction at home.
5 The main cause of the friction is the simple reality that "Law and Order" has lost audience.
6 Traction refers to the friction between a drive member and the surface it moves upon, where the friction is used to provide motion.