Concept explainers
Glue a penny to a string. When in a moving automobile, hang the string and penny out a window. Tt will be swept backward due to air resistance. When the string makes an angle of
To Explain: The angle makes the difference in the reading of the speedometer.
Explanation of Solution
Introduction:
The drag force varies directly with the square of the speed of the object such that
Or,
Where, b is the proportionality constant which is equal to the
So, the above expression becomes,
The drag force magnitude increases until this magnitude become equals to the gravitational force as velocity of the person increases. Thus, it produces a zero-net force. The terminal speed is depending on the inclination angle. As the angle increases, the speed also increases and hence, the drag force also increases.
Conclusion:
Thus, the angle makes the difference.
Chapter 6 Solutions
Conceptual Physics: The High School Physics Program
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