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 the well is R and the coefficient of friction between the tyres of the motorcycle and the wall of the well is s. The minimum speed the motor cyclist must have in order to prevent slipping should be -

Options

A. `sqrt((Rg)/(mu)_(s))`
B. `sqrt((mu_(s))/(Rg)`
C. `sqrt((mu_(s)g)/(R)`
D. `sqrt((R)/(mu_(s)g)`

Answer

A

Explanation

`N=(mv^(2))/(R),mg=mu_(s)N=(mu_(s)mv^(2))/(R)`
`therefore" "v=sqrt((Rg)/(mu))`