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A person wants to drive on the vertical suirface of a large cylindrical wooden `well` commonly known as `death well` in a circus. The radius of the well 2 meter, and the coefficient of friction between the tyers of the motorcycle and the wall of the well is `0.2` the minimum speed the motorcyclist must have in order to prevent slipping should beA. `10 m//s`B. `15 m//s`C. `20 m//s`D. `25 m//s` |
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Answer» `N=(mv^(2))/(R )` …….(`A`) `f_(max)=mg` `muN=mg` `mu(mv^(2))/(R )=mg` `v=sqrt((Rg)/(mu))=sqrt((2xx10)/(0.2))=10m//s` |
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