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Motion in Two Dimension — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMotion in Two Dimension1 Mark
Question
Assertion : During a turn, the value of centripetal force should be less than the limiting frictional force.
Reason : The centripetal force is provided by the frictional force between the tyres and the road.
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Answer

(a) The body is able to move in a circular path due to centripetal force. The centripetal force in case of vehicle is provided by frictional force. Thus if the value of frictional force $\mu mg$ is less than centripetal force, then it is not possible for a vehicle to take a turn and the body would overturn.Thus condition for safe turning of vehicle is, $ \mu m g \geq \frac{m v^2}{r}$.

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