Some people assert: "You can never achieve perpetual motion, for you can never get rid of friction." That dogmatic assertion is easily refuted. Look at the atom. The atom's electrons, if not disturbed, circulate around the nucleus forever without energy loss. Discuss this assertion and give examples to illustrate your opinion. You can take as examples perpetual motion balls and perpetual motion duck (see pictures below). Perpetual motion balls. Perpetual motion duck.