The Physics of Everyday Phenomena
The Physics of Everyday Phenomena
8th Edition
ISBN: 9780073513904
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Chapter 5, Problem 16CQ

If a car is equipped with air bags, should it be necessary to also wear seat belts? Explain. (See everyday phenomenon box 5.1.)

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As seen in the picture, an airboat is a special type of boat that has a large fan mounted on the back instead of a motor that sits in the water. It is used in places where the water is shallow and weedy, so motors that stick down into the water cannot be used. a) Using Newton’s Third Law, explain why the fan needs to be pointed so the air blows out backwards. b) If the force of the fan pushes the air backwards with 150 N, what is the forward force of the air on the boat? If the mass of the boat is 220 kg, and you ignore friction between the boat and the water, find how far the boat will travel in the first minute. c) How can the fan on the airboat be used to change the direction the boat is travelling in? How can it be used to increase or decrease the speed of the boat? d) If the boat is going upstream against a current that has a force of 250 N against the motion of the boat, find the acceleration of the boat if there is a forward force of 360 N from the fan. (Remember that…
A student suggests that the force of air resistance FA depends on the relative speed of an object passing through the air v according to FA = kvN, where k is a constant with appropriate units that depends on properties of the air and the size and shape of the object and N is a dimensionless exponent. The student has a hollow ball made of two hemispherical shells that can be connected together and disconnected, along with access to other commonly available materials. Write an experimental procedure that the student could follow to make measurements in order to find the value of N, and explain how a graph of In(FA) vs. In(v) could be used to find the values of k and N.

Chapter 5 Solutions

The Physics of Everyday Phenomena

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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Newton's First Law of Motion: Mass and Inertia; Author: Professor Dave explains;https://www.youtube.com/watch?v=1XSyyjcEHo0;License: Standard YouTube License, CC-BY