ballistics
From Longman Dictionary of Contemporary EnglishRelated topics: Physics, Weaponsballisticsbal‧lis‧tics /bəˈlɪstɪks/ noun [uncountable] HPPMWthe scientific study of the movement of objects that are thrown or fired through the air, such as bullets shot from a gunBallistics is followed by a singular verb: Ballistics is used to understand where and how a gun was fired.