Video narration
Mass two, speed two: enough for angular momentum about the origin? Like passing a pole, find the shortest sideways gap from your path. The missing piece is the path's distance from the origin. Rewrite y equals negative two x plus four as two x plus y minus four equals zero; perpendicular distance, four over root five. Mass times speed times distance: two times two times four over root five equals sixteen over root five kilogram metres squared per second-option one.