During a Recent Thunderstorm the Wind Was Blowing Past Your

During a recent thunderstorm the wind was blowing past your roof at 40 m/s (90 miles/hour) .Assuming that the density of air is 1.20 kg/m³,the size of the roof is 10 m by 15 m,and the air under the roof was at rest,the net force experienced by the roof was

A) 288 kN.
B) 144 kN.
C) 89 kN.
D) 75 kN.
E) 61 kN.

Correct Answer:

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