Chapter 9 Linear Momentum and 2)若某一方向合外力为零,则此方向动量守恒 Fe=0 ∑ F=0,P, FEx=O ,=C 2 12 If the component of the net external force on a closed system is zero along an axis then the component of the linear momentum of the system along that axis cannot changeChapter 9 Linear Momentum and Collisions If the component of the net external force on a closed system is zero along an axis, then the component of the linear momentum of the system along that axis cannot change. 2）若某一方向合外力为零, 则此方向动量守恒 . z z i i z z y y i i y y x x i i x x F p m C F p m C F p m C = = = = = = = = =    v v v 0, 0, 0, ex ex ex