10.1 After getting gas, you forget your mug of coffee on the roof of the car. As you drive away from the gas station, you accelerate down the road in a straight line at a constant rate of 1.4m /s². The mug has a mass of m = 0.4kg, a cross-sectional area of A = 0.01 m², and a drag coefficient of about C = 1. Note the density of air is p = 1.2 kg / m³, and let's take the coefficient of static friction between mugs and car roofs as about µs = 0.3. a) Draw a free-body diagram of the mug while it is sitting on the roof of your car. Do not neglect the drag force. b) Estimate the car's speed (in m/s and in miles per hour) at which the mug will start sliding off the roof.

10.1 After getting gas, you forget your mug of coffee on the roof of the car. As you drive away from the gas station, you accelerate down the road in a straight line at a constant rate of 1.4m /s². The mug has a mass of m = 0.4kg, a cross-sectional area of A = 0.01 m², and a drag coefficient of about C = 1. Note the density of air is p = 1.2 kg / m³, and let's take the coefficient of static friction between mugs and car roofs as about µs = 0.3. a) Draw a free-body diagram of the mug while it is sitting on the roof of your car. Do not neglect the drag force. b) Estimate the car's speed (in m/s and in miles per hour) at which the mug will start sliding off the roof.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

10.1 After getting gas, you forget your mug of coffee on the roof of the car. As you drive away from the gas
station, you accelerate down the road in a straight line at a constant rate of 1.4 m /s2. The mug has
a mass of m = 0.4 kg, a cross-sectional area of A = = 1.
Note the density of air is p = 1.2 kg / m³, and let's take the coefficient of static friction between mugs
and car roofs as about ls
0.01 m2, and a drag coefficient of about C
0.3.
a) Draw a free-body diagram of the mug while it is sitting on the roof of your car. Do not neglect the
drag force.
b) Estimate the car's speed (in m/s and in miles per hour) at which the mug will start sliding off the
roof.

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