SOURCE:- http://in.answers.yahoo.com/question/index?qid=20091120014432AA53zCd Posted by Pradeep17Ch (student), on 23/9/11 thumbs up plzzz... Posted by Pradeep17Ch (student), on 23/9/11 Thrust is a reaction force described quantitatively by Newton 's second and third laws . When a system expels or accelerates mass in one direction the accelerated mass will cause a force of equal