Physics meaning 「2]「mio02 元2 -mg +mlsin2 -mglcos Tangent and normal acceleration of C mg a,=1币=0an=l02 Xi -ma cos=F 九1=-F -ma sino=F-mg 九2=-F, 等m3=1-g1cs=0 九3=-LPhysics meaning x1 y1 C x y  mg at an Fx Fy L                       cos sin cos 2 2 3 2 1 mgl mg ml ml      0 t  a l 2   a l n  Tangent and normal acceleration of C m n Fx  a cos  ma F mg  n sin  y  cos 0 3 4 2 ml   L  mgl    2  Fy 3  L 1  Fx