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 2.1, Problem 3bT
An iron rod is held up by a magnet as shown. The magnet is held up by a string.
1. In the spaces below, sketch a free-body diagram for the iron rod and a separate free-body diagram for the magnet.
The label for each of the forces on your diagrams should indicate:
- the type of force (e.g., gravitational, normal),
- the object on which the force is exerted, and
- the object exerting the force.
2. For each of the forces shown in your diagram for the iron rod, identify the corresponding force that completes the
3. How would your diagram for the iron rod change if the magnet were replaced with a stronger magnet? Which forces would change (in type or in magnitude)? Which forces would remain the same?
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立
Use the figure to answer the following questions.
A magnet of mass 5.58 kg is suspended from the ceiling by a cord as shown. A large magnet is somewhere off to the right, pulling on the small hanging magnet with a constant force of F = 152.5 N. At what angle theta ?with respect to the vertical does the magnet hang?
a.
70.3 degrees
b.
19.7 degrees
c.
54.0 degrees
d.
59.0 degrees
Consider the same situation as in the previous problem. This time the magnet has mass 6.70 kg and the force pulling the magnet to the right has magnitude 99.9 N. What is the magnitude of the tension force in the cord?
a.
199.6 N
b.
292.2 N
c.
119.6 N
d.
165.6 N
the problem, explain in words as much as you do know.
12.
The inclined plane shown is tilted at an angle a = 20° with respect to the horizontal.
Mass m, = 25 kg and m2 = 10 kg.
A. If mass m2 is moving downward and the tension in the rope connecting the masses has magnitude
140 N, what is the coefficient of kinetic friction ug between mass m, and the ramp?
B. If mass m, is moving down the ramp when the rope connecting the masses is cut, what is the
acceleration of mass m, after the rope goes slack? Is the mass slowing down or speeding up? Assume
that uy has the same value you calculated in part A. If you weren't able to solve part A, use uy = 0.5 to
solve part B.
140N
m2
Chapter 2 Solutions
Tutorials in Introductory Physics
Ch. 2.1 - Draw a large dot on your large sheet of paper to...Ch. 2.1 - Describe the remaining forces you have indicated...Ch. 2.1 - All forces arise from interactions between...Ch. 2.1 - There are many different types of forces,...Ch. 2.1 - Consider the following discussion between two...Ch. 2.1 - Label each of the forces on your free-body diagram...Ch. 2.1 - Sketch a free-body diagram for a book at rest on a...Ch. 2.1 - A second book of greater mass is placed on top of...Ch. 2.1 - Compare the free-body diagram for the lower book...Ch. 2.1 - Which, if any, Newton’s third law force pairs are...
Ch. 2.1 - A magnet is supported by another magnet as shown...Ch. 2.1 - An iron rod is held up by a magnet as shown. The...Ch. 2.2 - Compare the net force (magnitude and direction) on...Ch. 2.2 - Draw separate free-body diagrams for system A and...Ch. 2.2 - Is the magnitude of the force exerted on system A...Ch. 2.2 - D. Identify all the Newton's third law...Ch. 2.2 - Rank the magnitudes of the horizontal forces that...Ch. 2.2 - Suppose the mass of each brick is 2.5 kg, the...Ch. 2.2 - Describe the motions of systems A and B. How does...Ch. 2.2 - Compare the net force (magnitude and direction) on...Ch. 2.2 - Draw and label separate free-body diagrams for...Ch. 2.2 - Consider the following discussion between two...Ch. 2.2 - Rank the magnitudes of all the horizontal forces...Ch. 2.2 - Compare the magnitude of the netforce on system C...Ch. 2.2 - Draw and label a free-body diagram for system C....Ch. 2.2 - At right is a free-body diagram for a cart. All...Ch. 2.3 - Describe the motions of block A, block B, and the...Ch. 2.3 - On a large sheet of paper, draw a separate...Ch. 2.3 - Identify all the Newton's third law...Ch. 2.3 - Rank, from largest to smallest, the magnitudes of...Ch. 2.3 - Consider the horizontal components of the forces...Ch. 2.3 - If the motion of the blocks is the same as in...Ch. 2.3 - Suppose the mass of the string that connects...Ch. 2.3 - A string exerts a force on each of the two objects...Ch. 2.3 - If you know that the net force on a massless...Ch. 2.3 - Predict the subsequent motions of objects A and B...Ch. 2.3 - Draw separate free-body diagrams for objects A and...Ch. 2.3 - Predict: • what will happen to object C when it is...Ch. 2.3 - Draw and label separate free-body diagrams for...Ch. 2.3 - The weight of a 200 g mass has magnitude...Ch. 2.3 - Consider the following statement about the...
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