A motor cyclist moving with a velocity of $72\, km/hour$ on a flat road takes a turn on the road at a point where the radius of curvature of the road is $20$ meters. The acceleration due to gravity is $10 m/sec^2$. In order to avoid skidding, he must not bend with respect to the vertical plane by an angle greater than
A motor cyclist moving with a velocity of $72\, km/hour$ on a flat road takes a turn on the road at a point where the radius of curvature of the road is $20$ meters. The acceleration due to gravity is $10 m/sec^2$. In order to avoid skidding, he must not bend with respect to the vertical plane by an angle greater than
- A
$\theta = {\tan ^{ - 1}}6$
- B
$\theta = {\tan ^{ - 1}}2$
- C
$\theta = {\tan ^{ - 1}}25.92$
- D
$\theta = {\tan ^{ - 1}}4$
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