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AP EAMCET20226 Jul 2022Morning ShiftPhysicsLaws of MotionActual

The coefficient of static friction between the road and tyres of a car is 0.4 . The maximum permissible speed of the car is 10 ~ms ⁻¹ on curved unbanked road. Then the maximum radius of curvature of the road is (acceleration due to gravity =10 ~ms ⁻² )

Options

  1. A10 5 ~m
  2. B25 ~m
  3. C20 2 ~m
  4. D30 ~m

Correct answer

B. 25 ~m

Step-by-step solution

The necessary centripetal force is provided by friction force aligned & So, mV ^2 r = mg & V = rg & 10= 0.4 r 10 & 100=4 r & r =25 ~m aligned

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