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 2.3, Problem 2aT
If the motion of the blocks is the same as in section I, how does the net force on the string compare to the net force on the rope?
1. Determine whether the net force on each of the objects is greater than, less than, or equal to the net force on the object in section I. Explain.
- block A
- block B
- the system composed of the blocks and the connecting rope or string
2. Compare the horizontal components of the following pairs of forces:
- the forces on the string by block A and the rope by block A. Explain.
- the forces on the string by block B and the rope by block B. Explain.
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Problem 1
To bodies A and B in the figure are separated by a spring. Their motion down the
incline is resisted by a force P = 800 N. The coefficient of kinetic friction is 0.30 under
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a. Compute the acceleration of block A.
b. Compute the acceleration of block B.
c. Determine the force in the spring.
P=800 N
S
Jo
1600 N
1
-0.30
(3
2400 N
Januman-f
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1
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In the diagram above, block 1 is stacked on top of block 2. The blocks are at rest on a flat plane. The mass of each block is
known.
To which system could we apply Newton's laws in order to find the magnitude of the contact force between the blocks? Mark
all systems that are useful for this purpose.
The "block 1 system" is useful for finding the contact force between blocks 1 and 2.
The "block 2 system" is useful for finding the contact force between blocks 1 and 2.
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1. Apply Newton's second law to find the formula for the acceleration of the system. Ignore friction and the masses of the pulley and cord.
Express your answer in terms of the variables mAmB, and appropriate constants.
2. Apply Newton's second law to find the formula for the tension in the cord. Ignore friction and the masses of the pulley and cord.
Chapter 2 Solutions
Tutorials in Introductory Physics
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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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