Q. The maximum speed that can be achieved without skidding by a car on a circular unbanked road of radius $R$ and coefficient of static friction $\mu$, is
A) $\mu Rg$
B) $Rg\sqrt{\mu}$
C) $\mu\sqrt{Rg}$
D) $\sqrt{\mu Rg}$
Explanation
(d) In the given condition the required centripetal force is provided by frictional force between the road and tyre
$\frac{mv^{2}}{R} = \mu mg$
$\therefore v = \sqrt{\mu\ Rg}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.