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Safari File Edit View History Bookmarks Window Help m 4096 D. Sun Mar 11 10:27 PM Q E saplinglearning.com 0 Sapling Learning # (2) Jump to... Ruben Chavez 03/11/2018 11:59 PM (960.6/10003/11/201 8 09:34 PM Assignment Information Attempts Score Gradebook # PrintCalculatorPeriodic Table Question 22 of 24 Available From: Not Set Due Date Points Possible: 100 Grade Category: Graded 10 100 90 121100 100 Map 3/11/2018 11:59 PM Sapling Learning A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the track is a turn with radius 57.0 m. If we approximate the track to be completely flat and the racecar is traveling at a constant 30.5 m/s (about 68 mph) around the turn, what is the racecar's centripetal (radial) acceleration? Description 13 Number Policies: 14 m/s 15110 16 17 You can check your answers. You can view solutions when you complete give up on any question. You can keep trying to answer each questio until you get it right or give up You lose 5% of the points available to each answe attempt at that answer What is the force responsible for the centripetal acceleration in this case? O gravity O friction 100 r in your question for each incorrect O weight eTextbook 19 20 21 To keep from skidding into the wall on the outside of the turn what is the minimum coefficient of static friction between the racecar's tires and track? Help With This Topic Number Web Help& Videos 23 O Technical Support and Bug Reports Previous Give Up & View Solution Chek Answer Next Exit Hint 24 2011-2018 Sapling Learning. Inc. bout us careers privacy policy terms of usecontact us help

Explanation / Answer

here,

radius , r = 57 m

constant speed , u = 30.5 m/s

the racecar's centripital accelration , ac = u^2 /r

ac = 30.5^2 /57 m/s^2

ac = 16.3 m/s^2

the racecar's centripital accelration is 16.3 m/s^2

the force responsible for the centripital accelration in this case is Friction

let the coefficient of static friction be us

to keep from skidding

us * g = ac

us * 9.81 = 16.3

solving for us

us = 1.66

the minimum value of coefficient of static friction is 1.66

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