Q. A curved road of diameter 1.8 km is banked so that no friction is required at a speed of $30\ ms^{- 1}$. What is the banking angle?
A) 6${^\circ}$
B) 16${^\circ}$
C) 26${^\circ}$
D) 0.6${^\circ}$
Explanation
(a) tan$\ \theta = \frac{v^{2}}{rg} = \frac{30 \times 30}{900 \times 9.8} = 0.102$
$\therefore\theta = 6{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.