Question

The coefficient of friction between the tyres and the road is 0.25. The maximum speed with which a car can be driven round a curve of radius 40 m with skidding is (assume g = 10 ms^–2) The coefficient of friction between the tyres and the road is 0.25. The maximum speed with which a car can be driven round a curve of radius 40 m with skidding is (assume g = 10 ms^–2)

• A. $40ms^{- 1}$
• B. $20ms^{- 1}$
• C. $15ms^{- 1}$
• D. $10ms^{- 1}$

Answer 1

Answer: (D)

$10ms^{- 1}$

Answer 2

${v\sqrt{\mu rg}}_{\max} = \sqrt{0.25 \times 40 \times 10} = 10m/s$