During a thunderstorm, winds with a speed of 47.0 m/s blow across a flat roof wi
ID: 2281750 • Letter: D
Question
During a thunderstorm, winds with a speed of 47.0 m/s blow across a flat roof with an area of 785 m2. (a) Find the magnitude of the force exerted on the roof as a result of this wind.kN
(b) Is the force exerted on the roof in the upward or downward direction?
During a thunderstorm, winds with a speed of 47.0 m/s blow across a flat roof with an area of 785 m2. (a) Find the magnitude of the force exerted on the roof as a result of this wind.
kN
(b) Is the force exerted on the roof in the upward or downward direction?
(a) Find the magnitude of the force exerted on the roof as a result of this wind.
kN
(b) Is the force exerted on the roof in the upward or downward direction?
Explanation / Answer
here,
Change in Pressure , P = 0.5 * 1.214 * 47^2 = 1340.86 Pa
Force = 1340.86 * 785/1000 = 1052.6 kN
b)
as there is lower pressure outside ,
Force is Upwards
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