Question

The maximum speed with which a car cross a convex bridge over a river with radius of curvature 9 m is : (given that the center of gravity of car is 1m above the road)

• A. 50 m/s
• B. 30 m/s
• C. 20 m/s
• D. 10 m/s

Answer 1

The correct option is D 10 m/s

$\frac{\mathrm{m/}{v}^2}{r}=\mathrm{m/}g.$

$v^2=gr.$

$=10\times 10$

$v=10m/s^{-1}$