A circular racetrack of radius 300 m is banked at an angle of 20^(@). If the coefficient of friction between the wheels of the race car and the road is 0.2, what is the approximate maximum permissible speed of the race car ?

A circular racetrack of radius 300 m is banked at an angle of 20^(@).

1.	A circular racetrack of radius 300 m is banked at an angle of 20^(@). If the coefficient of friction between the wheels of the race car and the road is 0.2, what is the approximate maximum permissible speed of the race car ?
Answer» `88.2 MS^(-1)` `86.4 ms^(-1)` `42.3 ms^(-1)` none of the given Solution :`v_(max)= sqrt( G(mu_(s) + tan THETA )/( 1-mu_(s)tan theta ))` `=sqrt(2940(0.608))` `=42 .28m//s` `=42.3m//s`