The coefficient of friction between the rubber tyres and the road way is 0.25. The maximum speed with which a car can be driven round a curve of radius 20 m without skidding is (g=9.8 m / s 2)

Question

The coefficient of friction between the rubber tyres and the road way is 0.25. The maximum speed with which a car can be driven round a curve of radius 20 m without skidding is (g=9.8 m / s 2) (A) 5 m/s (B) 7 m/s (C) 10 m/s (D) 14 m/s

Tardigrade Admin · Accepted Answer

μ m g=m v2 / r or v=√μ g r or v=√(0.25 × 9.8 × 20)=7 m / s

Q. The coefficient of friction between the rubber tyres and the road way is $0.25$ . The maximum speed with which a car can be driven round a curve of radius $20 m$ without skidding is $(g = 9.8 m / s^{2})$

5 m/s

7 m/s

10 m/s

14 m/s

$μ m g = m v^{2} / r$ or $v = μg r$
or $v = (0.25 \times 9.8 \times 20) = 7 m / s$

Q. The coefficient of friction between the rubber tyres and the road way is 0.25. The maximum speed with which a car can be driven round a curve of radius 20m without skidding is (g=9.8m/s2)