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IP During a thunderstorm, winds with a speed of 47.7 m/s
Chapter 15, Problem 67P(choose chapter or problem)
Problem 67P
IP During a thunderstorm, winds with a speed of 47.7 m/s blow across a flat roof with an area of 668 m2. (a) Find the magnitude of the force exerted on the roof as a result of this wind. (b) Is the force exerted on the roof in the upward or downward direction? Explain.
Questions & Answers
QUESTION:
Problem 67P
IP During a thunderstorm, winds with a speed of 47.7 m/s blow across a flat roof with an area of 668 m2. (a) Find the magnitude of the force exerted on the roof as a result of this wind. (b) Is the force exerted on the roof in the upward or downward direction? Explain.
ANSWER:
Step 1 of 4
The pressure difference between the inside of the house, where the wind speed is zero, and the top of the roof, where the wind speed is , creates an upward force on the roof, as shown in the figure.