Exercises Roll center. Determine the roll center of the kinematic models of vehicles shown in Figures 7.55 to 7.58 . FIGURE 7.55. A double A-arm suspension FIGURE 7.56. A double A-arm suspension1. Roll center. Determine the roll center of the kinematic models of vehicles shown in Figures 7.55 to 7.58.FIGURE 7.57. A McPherson suspension