A Hurricane Strength Wind Is Blowing at a Speed of 100

Multiple Choice

A hurricane strength wind is blowing at a speed of 100 km/hr over a flat square roof of 10 m per side.Assuming the inside of the house to be at 1 atm pressure and the density of air is 1.3 kg/m³,calculate the lifting force on the roof.

A) 5.0 $\times$ 10³ N
B) 3.8 $\times$ 10⁴ N
C) 5.0 $\times$ 10⁴ N
D) 1.0 $\times$ 10⁵ N
E) 6.5 $\times$ 10⁴ N