Question: A thin sheet of fiberboard weighs 90 N and lies on a rooftop, as shown in the figure. Assume ambient air at 20°C and 1

A thin sheet of fiberboard weighs 90 N and lies on a rooftop, as shown in the figure. Assume ambient air at 20°C and 1 atm. If the coefficient of solid friction between board and roof is σ = 0.12, what wind velocity will generate enough friction to dislodge the board?

2m 3 m 1.5 m Fiberboard 2 Roof

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