Chapter 8 Dynamics of Vehicles Section2 Force Analysis of automobiles (a) (b) Figure 8-5 Free-body diagram of driven Figure 8-6 Free-body diagram of wheels rolling on the hard pavement driving wheels rolling on the hard pavement Rolling resistance equal to the product of the rolling resistance coefficient and the wheel load: F,=Wf Automobile and Tractor Northwest A&F UniversityAutomobile and Tractor Northwest A&F University Chapter 8 Dynamics of Vehicles F Wf f = Rolling resistance equal to the product of the rolling resistance coefficient and the wheel load: Figure 8-5 Free-body diagram of driven wheels rolling on the hard pavement Figure 8-6 Free-body diagram of driving wheels rolling on the hard pavement Section2 Force Analysis of automobiles