Question
A person wants to drive on the vertical surface of a large cylindrical wooden well commonly known as death well in a circus. The radius of well is R and the coefficient of friction between the tyres of motorcycle and the wall of the well is `mu` .The minimum speed , the motorcyclist must have in order to prevent slipping should be
Answer: Option A
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` N= (mv^2)/(R)`
`mu_2 N > mg`
`(mu_2 mv^2)/(R) > mg`
or `v > sqrt(((Rg)/(mu_s)))`
`:.` `v_min = sqrt(((Rg)/(mu_s)))`
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