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BITSAT2020PhysicsLaws of MotionActual

The coefficient of friction between the rubber tyres and the road wayis 0.25 . The maximum speed with which a car can be driven round a curve of radius 20 ~m without skidding is ( g =9.8 ~m / s ² )

Options

  1. A5 ~m / s
  2. B7 ~m / s
  3. C10 ~m / s
  4. D14 ~m / s

Correct answer

B. 7 ~m / s

Step-by-step solution

mg = mv ² / r or v = g r or v= (0.25 9.8 20) =7 ~m / s

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