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A car of mass 'm' moves on a banked road having radius 'r' and banking angle  . To avoid slipping from banked road, the maximum permissible speed of the car is v 0 . The coefficient of friction μ between the wheels of the car and the banked road is : -

1. μ =    tan v – rg tan rg v 2 0 2 0
2. μ =     tan v rg tan rg v 2 0 2 0
3. μ =    tan v rg tan rg – v 2 0 2 0
4. μ =   tan v – rg tan rg – v 2 0 2 0

Correct answer: μ =    tan v rg tan rg – v 2 0 2 0

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