Question

04. Assuming the coefficient of friction between the road and tyres of a car to be 0.5, the
maximum speed with which the car can move round a curve of 40.0 m radius without
slipping, if the road is unbanked, should be
(a) 25 m/s
(b) 19 m/s
(c) 14 m/s
(d) 11 m/s​

Answer 1

Answer:

(C) 14 m/s

Explanation:

at maxi speed "v", to avoid slipping -

umg = mv^2/r

=> v^2 = urg = 0.5 × 40 × 9.8 = 98×2

=> v = √(2×98) = 14 m/s

Answer 2

Answer:

C) 14 m/s

Explanation:

at maxi speed "v", to avoid slipping -

umg = mv^2/r

=> v^2 = urg = 0.5 × 40 × 9.8 = 98×2

=> v = √(2×98) = 14 m/s