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A circular road of radius r is banked for a speed $v = 40 km/hr$ . A car of mass attempts to go on the circular road. The friction coefficient between the tyre and the road is negligible

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If the car turns at the correct speed of

40 km/hr

, the force by the road on the car is greater than mg aswell as greater than

\frac{{mv}^{2}}{2}

The car cannot make a turn without skidding

If the car turns at the speed of

40 km/hr

, the force by the road on the car is equal to

\frac{{mv}^{2}}{r}

If the car turns at a speed less than

40 km/hr

, it will slip down

answer is B.

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Detailed Solution

According to concept if the car turns at a speed less than 40km/hr, it slips down

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