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File Edit View History Bookmarks People Window Help 70% C Fri Apr 14 8:34:20 AM Mastering Physics: Ch 13 HW Secure https://session.masteringphysics.com/myct/itemview?assignmentProblemID 73337562&offset; prev PHY143 W17 College Physics Tarini Signed in as lsalah Alexander Ch 13 HW Problem 13.48 previous l 9 of 10 l next Problem 13.48 Part A A friend asks you how much pressure is in your car What answer will you give your friend? ng a tires. You know that the tire manufacturer Express your answer using two significant figures. recommends 30 psi but it's been a while since ng, you've checked. You can't find a tire gauge in the car, but you do find the owner's manual and a ruler. Fortunately, you've just finished taking physics, so you tell your friend, don't know, but can figure it ding. out." From the owners manual you find that the cars mass is 1500 kg It seems reasonable to assume that each tire supports one-fourth of the dings weight. With the ruler you find that the tires are 15 Submit My Answers Give Up wide and the fattened segment of the tire in contact with the road is 13 cm long. Continue

Explanation / Answer

Area = 15 x13 = 165 cm2 =0.0165 m2

Load per tire = 1500/4

=375 kg

Weight experienced by 1 tire = 375 ×9.8 N

Pressure in tire= 375x9.8/0.0165

=222727.2727 Pa

=32.295 psi

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