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You are shown a photo of a car driven on...

You are shown a photo of a car driven on a vertical-inside wall of a huge cylinder of radius `50 m`. The coefficient of static friction between the car tires and the cylinder is `mu_(s)=0.8 .` The minimum speed (in `m / s` ) at which the car can be driven like that is `5 x`. Find `x`.
'(##CEN_KSR_PHY_JEE_C07_021_Q12##)'

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