Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 16.1, Problem 2aTH
Consider the following statement made by a student about a book at rest on a level table:
“The two forces exerted on the book are the normal force directed up and the weight of the book directed down. These are equal and opposite to one another. By
Do you agree with the student? Explain why you agree or disagree.
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Students have asked these similar questions
A hanging chair hangs from a single chain, as shown
above. The chair is not moving and the chain is the
only thing that holds the chair up. There are no
significant forces on the chair aside from the tension in
the chain and the weight of the chair. We know that
these two forces are equal and opposite. Which of the
following correctly explains how we know that these
two forces are equal and opposite? Choose all that
apply. More than one answer may be correct.
O Those two forces form a "third law pair" for the chair.
O The chair is not accerlerating.
O Compared to the chair, the chain is essentially massless.
O Newton's third law.
O Newton's second law.
Problem 5: An object of mass m has these three forces acting on it (there is no normal force,
"no surface"). F = 3 N, F2 = 10 N, and F3 = 5 N. When answering the questions below, assume the
x-direction is to the right, and they-direction is straight upwards.
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What is the magnitude of the net force, in newtons?
What is the angle e, in degrees, of the net force, measured from the +x-axis? Enter an angle between -180° and 180°.
What is the magnitude, Ja of the acceleration, in meters per square second, if the block has a mass of 8.9 kg?
A person pushes on a stationary 125 N box with a force of 75 N at 30∘ below the horizontal, as shown in the figure. (Figure 1) The coefficient of static friction between the box and the horizontal floor is 0.84.
What is the normal force on the box?
What is the friction force on the box?
What is the largest the friction force could be?
The person now replaces his push with a 75 N pull at 30∘ above the horizontal. Find the normal force on the box in this case.
Chapter 16 Solutions
Tutorials in Introductory Physics
Ch. 16.1 - Draw a freebody diagram for the book. Label each...Ch. 16.1 - How do the forces exerted on the book in this case...Ch. 16.1 - Consider the following statement made by a student...Ch. 16.1 - Consider a book on top of a level table while the...Ch. 16.1 - Review your answer to part a. In addition, reread...Ch. 16.1 - In the spaces below, draw a free-body diagram for...Ch. 16.1 - Identify all the Newton’s third law...Ch. 16.1 - Rank, from largest to smallest, the magnitudes of...Ch. 16.1 - Draw and label a freebody diagram for system S12 .Ch. 16.1 - Compare the forces that appear on your free-body...
Ch. 16.1 - Let C represent the system consisting of the whole...Ch. 16.1 - A block is at rest on an incline as shown below at...Ch. 16.1 - A block is at rest on an incline as shown below at...Ch. 16.1 - A block is at rest on an incline as shown below at...Ch. 16.1 - Draw a free-body diagram for the book. Label the...Ch. 16.1 - For each force that appears on your free-body...Ch. 16.2 - In the spaces provided draw and label separate...Ch. 16.2 - Rank the magnitudes of all the horizontal forces...Ch. 16.2 - Are any of the forces that you drew for instant 1...Ch. 16.2 - Are any of the forces that you drew for instant 1...Ch. 16.2 - Two creates, A and B, are in an elevator as shown....Ch. 16.2 - As the elevator approach its destination, its...Ch. 16.2 - Prob. 3aTHCh. 16.2 - The vector representing the acceleration systems A...Ch. 16.2 - The vector representing the net force on system A...Ch. 16.2 - The vector representing the frictional force on...Ch. 16.2 - Prob. 4bTHCh. 16.2 - Prob. 4cTHCh. 16.2 - Prob. 4dTHCh. 16.2 - Prob. 5aTHCh. 16.2 - Using only the forces in your free-body diagram...Ch. 16.2 - Using only the forces in your free-body diagrams...Ch. 16.2 - Suppose the friction between the two blocks is...Ch. 16.3 - Draw an arrow to indicate the direction of the...Ch. 16.3 - Draw an arrow to indicate the direction of force...Ch. 16.3 - Draw and label a free-body diagram for the block...Ch. 16.3 - Prob. 2THCh. 16.3 - Describe the motion of each of the systems A, B,...Ch. 16.3 - Draw vectors below to represent the acceleration...Ch. 16.3 - Draw and label separate freebody diagrams for...Ch. 16.3 - Rank the magnitudes of the net forces on systems...Ch. 16.3 - Write expressions for the tension in strings P and...
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