Chapter 8 Dynamics of Vehicles Section2 Force Analysis of automobiles d Gcosa(bfr)-Ghg sin a-mhs ∑I-Fh F= L F2= a+列-Gnr+空+7+5人 L Simplified as: (Ghg sin amdi F-G du) b(Ghg sin am di F2=G LL ) Automobile and Tractor Northwest A&F UniversityAutomobile and Tractor Northwest A&F University Chapter 8 Dynamics of Vehicles F ) dt du (Gh α m L h L b F G F ) dt du (Gh α m L h L b F G L T F h dt du G a f r G h m h F L T F h dt du G b f r G h m h F g w g z g w g z g g i w w z g g i w w z = + + + = − + + + + + + + = − − − − − =   sin sin Simplified as cos ( ) sin cos ( ) sin 2 1 2 1 ：     Section2 Force Analysis of automobiles