Question

If a curve with a radius of 90 m is properly banked for a car traveling 68 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 96 km/h?

Answer 1

Noso Nsino f coso f fsince lo ting for Ist case for can tra properly banked traveling at 68 km/ & Nsino Ncaso 6 ng 4 18.89 mis (provide 2 men 2 R centripetal tano Lel 18.892 force) Rg = = 0.405 go X9.8 22.03° Now for o = 96 km 26-67 m/s coefficient q static friction is u (3 Ncoso = f sin f Nsino + fersoa sinating fa un ossed men 9 5 f 7 from 3 & 6 N (Cos 22.03° – US1n22.03 ) = mg -6 from N (sin 22.03° + u cos 22.03 ) = mun by (7) 0.93-u 0.38 9.8xgo 0.38 + dio.93 26.672 or, 0.93-1 0.38 = 0.47 + 1.15 u u X 1.53 6.46 = 1.24 u =