[填空题]
If a curve with a radn ++gmlxm vg(xt):or6x 82ttvius 1ca47j6ep,:m lp 6jhamd0s he of 88 m is perfectly banked for a car traveling 75 $\mathrm{~km} / \mathrm{h}$ , what must be the coefficient of static friction for a car not to skid when traveling at 95 $\mathrm{~km} / \mathrm{h}$ ?