The Physics of Everyday Phenomena
8th Edition
ISBN: 9780073513904
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 5, Problem 1CQ
Suppose that the speed of a ball moving in a horizontal circle is increasing at a steady rate. Is this increase in speed produced by the centripetal acceleration? Explain.
Expert Solution & Answer
To determine
Whether the increase in speed of the ball moving in horizontal circle is produced by the centripetal acceleration.
Answer to Problem 1CQ
The increase in the speed of the ball moving in horizontal circle is not produced by the centripetal acceleration.
Explanation of Solution
Centripetal acceleration is the rate of change in velocity of an object that is associated with the change in direction of the velocity. It is always perpendicular to the velocity vector itself and toward the center of the curve.
The centripetal acceleration is directly proportional to the square of the speed of the object and inversely proportional to the radius of the curve. There must be a force acting on the object to produce the centripetal acceleration.
In the given situation, speed of the ball moving in the horizontal circle is increasing. But centripetal acceleration is associated with change in direction of the velocity vector and not the change in magnitude of the velocity vector or speed.
Conclusion:
Thus the increase in the speed of the ball moving in horizontal circle is not produced by the centripetal acceleration.
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Chapter 5 Solutions
The Physics of Everyday Phenomena
Ch. 5 - Suppose that the speed of a ball moving in a...Ch. 5 - A car travels around a curve with constant speed....Ch. 5 - Two cars travel around the same curve, one at...Ch. 5 - A car travels the same distance at constant speed...Ch. 5 - The centripetal acceleration depends upon the...Ch. 5 - A ball on the end of a string is whirled with...Ch. 5 - Before the string breaks in question 6, is there a...Ch. 5 - For a ball being twirled in a horizontal circle at...Ch. 5 - A car travels around a flat (nonbanked) curve with...Ch. 5 - Is there a maximum speed at which the car in...
Ch. 5 - If a curve is banked, is it possible for a car to...Ch. 5 - If a ball is whirled in a vertical circle with...Ch. 5 - Sketch the forces acting upon a rider on a Ferris...Ch. 5 - Which safety measure, seat belts or air bags,...Ch. 5 - In a head-on collision between two vehicles, is...Ch. 5 - If a car is equipped with air bags, should it be...Ch. 5 - In what way did the heliocentric view of the solar...Ch. 5 - Did Ptolemys view of the solar system require...Ch. 5 - Heliocentric models of the solar system...Ch. 5 - How did Keplers view of the solar system differ...Ch. 5 - Consider the method of drawing an ellipse pictured...Ch. 5 - Does a planet moving in an elliptical orbit about...Ch. 5 - Does the sun exert a larger force on the Earth...Ch. 5 - Is there a net force acting on the planet Earth?...Ch. 5 - Three equal masses are located as shown in the...Ch. 5 - Two masses are separated by a distance r. If this...Ch. 5 - A painter depicts a portion of the night sky as...Ch. 5 - At what times during the day or night would you...Ch. 5 - At what times of the day or night does the...Ch. 5 - Are we normally able to see the new moon? Explain.Ch. 5 - During what phase of the moon can a solar eclipse...Ch. 5 - A synchronous satellite is one that does not move...Ch. 5 - Is Keplers third law valid for artificial...Ch. 5 - Since the Earth rotates on its axis once every 24...Ch. 5 - Prob. 35CQCh. 5 - Prob. 36CQCh. 5 - Prob. 1ECh. 5 - Prob. 2ECh. 5 - Prob. 3ECh. 5 - Prob. 4ECh. 5 - Prob. 5ECh. 5 - Prob. 6ECh. 5 - Prob. 7ECh. 5 - Prob. 8ECh. 5 - Prob. 9ECh. 5 - Prob. 10ECh. 5 - Prob. 11ECh. 5 - Prob. 12ECh. 5 - Prob. 13ECh. 5 - Prob. 14ECh. 5 - Prob. 15ECh. 5 - Prob. 16ECh. 5 - Prob. 1SPCh. 5 - Prob. 2SPCh. 5 - Prob. 3SPCh. 5 - Prob. 4SPCh. 5 - Prob. 5SPCh. 5 - Prob. 6SP
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