Q.
If a car is to travel with a speed $v$ along the frictionless, banked circular track of radius $r$, the required angle of banking so that the car does skid is
A) $\theta = \tan^{- 1}\left( \frac{v^{2}}{rg} \right)$
B) $\theta = \tan^{- 1}\left( \frac{v}{rg} \right)$
C) $\theta = \tan^{- 1}\left( \frac{r^{2}}{vg} \right)$