University Physics with Modern Physics (14th Edition)
University Physics with Modern Physics (14th Edition)
14th Edition
ISBN: 9780321973610
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 2.1DQ

Does the speedometer of a car measure speed or velocity? Explain.

Expert Solution & Answer
Check Mark
To determine

The speedometer of the car measure the speed or velocity.

Answer to Problem 2.1DQ

Speedometer does not measure the direction of the car this means that speedometer will not measure the velocity of the car. Therefore, the speedometer is measure speed of the car.

Explanation of Solution

The speed is defined as the ratio of the distance travel by the particle to the time taken by the particle. Speed is a scalar quantity.

The velocity is defined as the ratio of the displacement of the particle to the time taken by the particle. The velocity is a vector quantity and the direction of velocity is same as the direction of displacement.

Conclusion:

Speedometer does not measure the direction of the car this means that speedometer will not measure the velocity of the car. Therefore, the speedometer is measure speed of the car.

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Chapter 2 Solutions

University Physics with Modern Physics (14th Edition)

Ch. 2 - Under what conditions does the magnitude of the...Ch. 2 - When a Dodge Viper is at Elwoods Car Wash, a BMW...Ch. 2 - A driver in Massachusetts was sent to traffic...Ch. 2 - Can you have zero displacement and nonzero average...Ch. 2 - Can you have zero acceleration and nonzero...Ch. 2 - Can you have zero velocity and nonzero average...Ch. 2 - An automobile is traveling west. 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