A person places a cup of coffee on the roof of her car while she dashes back into the house for a forgotten item. When she returns to the car, she hops in and takes off with the coffee cup still on the roof. You may want to review (Pages 156 - 163) Part A If the coefficient of static friction between the coffee cup and the roof of the car is 0.21, what is the maximum acceleration the car can have without causing the cup to slide? Ignore the effects of air resistance. Express your answer using two significant figures. Πνα ΑΣφ a = m/s? Submit Request Answer • Part B What is the smallest amount of time in which the person can accelerate the car from rest to 27 m/s and still keep the coffee cup on the roof? Express your answer using two significant figures.

A person places a cup of coffee on the roof of her car while she dashes back into the house for a forgotten item. When she returns to the car, she hops in and takes off with the coffee cup still on the roof. You may want to review (Pages 156 - 163) Part A If the coefficient of static friction between the coffee cup and the roof of the car is 0.21, what is the maximum acceleration the car can have without causing the cup to slide? Ignore the effects of air resistance. Express your answer using two significant figures. Πνα ΑΣφ a = m/s? Submit Request Answer • Part B What is the smallest amount of time in which the person can accelerate the car from rest to 27 m/s and still keep the coffee cup on the roof? Express your answer using two significant figures.

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Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 5P

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A person places a cup of coffee on the roof of his carwhile he dashes back into the house for a forgotten item. When hereturns to the car, he hops in and takes off with the coffee cup stillon the roof. (a) If the coefficient of static friction between the coffee cup and the roof of the car is 0.24, what is the maximum acceleration the car can have without causing the cup to slide? Ignorethe effects of air resistance. (b) What is the smallest amount oftime in which the person can accelerate the car from rest to15 m>sand still keep the coffee cup on the roof?
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