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Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli
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Solved: During a Chicago storm, winds can whip

Chapter 1, Problem 9P

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QUESTION:

(II) During a Chicago storm, winds can whip horizontally at speeds of \(100 \mathrm{~km} / \mathrm{h}\). If the air strikes a person at the rate of \(40 \mathrm{~kg} / \mathrm{s}\) per square meter and is brought to rest, estimate the force of the wind on a person. Assume the person is \(1.50 \mathrm{~m}\) high and \(0.50 \mathrm{~m}\) wide. Compare to the typical maximum force of friction \((\mu \approx 1.0)\) between the person and the ground, if the person has a mass of \(70 \mathrm{~kg}\).

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QUESTION:

(II) During a Chicago storm, winds can whip horizontally at speeds of \(100 \mathrm{~km} / \mathrm{h}\). If the air strikes a person at the rate of \(40 \mathrm{~kg} / \mathrm{s}\) per square meter and is brought to rest, estimate the force of the wind on a person. Assume the person is \(1.50 \mathrm{~m}\) high and \(0.50 \mathrm{~m}\) wide. Compare to the typical maximum force of friction \((\mu \approx 1.0)\) between the person and the ground, if the person has a mass of \(70 \mathrm{~kg}\).

ANSWER:

Step 1 of 3

The surface area of the man is calculated as,

                                                                    

For  and ,

                                                                    

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