Determine the wind speed that is required to knock over the garbage can, which has

a height of $1\mathrm{.}5m$ and a diameter of $0\mathrm{.}5m.$ The weight of the garbage can is $90N.$

The density and the viscosity of the air are $1\mathrm{.}2k\frac{g}{m^3}$ and $1\mathrm{.}8{10}^{-5}Pa.s,$ respectively.

$($Ans $8\mathrm{.}165\frac{m}{s})$