The curved section of a horizontal highway is a circular unbanked arc of radius 550 m. If the coefficient of static friction between this roadway and typical tires is 0.30, what would be the maximum safe driving speed for this horizontal curved section of highway?

The value is

Explanation:

From the question we are told that

The radius is  

  The coefficient of static friction is

   Generally the maximum safe driving speed is mathematically represented as

=>    

=>    

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

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