Q. 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 a radius 40 $m$ without skidding is (assume $g = 10\ ms^{- 2}$)
A) 40 $ms^{- 1}$
B) 20$\ ms^{- 1}$
C) 15$\ ms^{- 1}$
D) 10$\ ms^{- 1}$
Explanation
(d) $v = \sqrt{\mu rg} = \ \sqrt{0.25 \times 40 \times 10} = 10\ m/s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.