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ch 18 2. Consider the following statement made by a "The magnitude of the force exerted by the block on an individual string is the same as the magnitude of the force exerted by that string on the block. They are a third law force pair. So I The student has correctly identified a Newton's third law (action-reaction) force pair. Explain don't understand why the block doesn't move at constant speed if that is true " why this does not mean that the block must move at constant speed. buld

ch 18 2. Consider the following statement made by a "The magnitude of the force exerted by the block on an individual string is the same as the magnitude of the force exerted by that string on the block. They are a third law force pair. So I The student has correctly identified a Newton's third law (action-reaction) force pair. Explain don't understand why the block doesn't move at constant speed if that is true " why this does not mean that the block must move at constant speed. buld

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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**Mechanics: Tension Homework** **HW-48** 2. Consider the following statement made by a student about each of the four motions in problem 1. "The magnitude of the force exerted by the block on an individual string is the same as the magnitude of the force exerted by that string on the block. They are a third-law force pair. So I don't understand why the block doesn't move at constant speed if that is true." The student has correctly identified a Newton's third law (action-reaction) force pair. Explain why this does not mean that the block must move at constant speed. --- **3. Five identical blocks, each of mass m, are pulled across a table as shown. Use the approximations that the table is frictionless and the strings are massless.** The diagram shows three systems: - **System A** (single block) pulled by string P. - **System B** (two blocks) pulled by string Q. - **System C** (two blocks) pulled by string R. a. Describe the motion of each of the systems A, B, and C. b. Draw vectors below to represent the acceleration of each system. | | | | |--------------|------------------------------|--------------------------------| | **System A** | **System B** | **System C** | | Acceleration vector for system A | Acceleration vector for system B | Acceleration vector for system C | c. Draw and label separate free-body diagrams for systems A, B, and C. | | | | |---------------------------|-------------------------------|-------------------------------| | **Free-body diagram for system A** | **Free-body diagram for system B** | **Free-body diagram for system C** | d. Rank the magnitudes of the net forces on systems A, B, and C. Explain. e. Write expressions for the tension in strings P and R in terms of T_Q, the tension in string Q. Show all your work. --- **Detailed Explanation of Diagrams:** The main diagram displays three systems arranged from left to right: 1. **System A** consists of a single block of mass m attached to string P. 2. **System B** consists of two blocks of mass m each connected by string Q. 3. **System C** is identical to system B, consisting of two blocks connected by string R. In the subsection for acceleration vectors
Transcribed Image Text:**Mechanics: Tension Homework** **HW-48** 2. Consider the following statement made by a student about each of the four motions in problem 1. "The magnitude of the force exerted by the block on an individual string is the same as the magnitude of the force exerted by that string on the block. They are a third-law force pair. So I don't understand why the block doesn't move at constant speed if that is true." The student has correctly identified a Newton's third law (action-reaction) force pair. Explain why this does not mean that the block must move at constant speed. --- **3. Five identical blocks, each of mass m, are pulled across a table as shown. Use the approximations that the table is frictionless and the strings are massless.** The diagram shows three systems: - **System A** (single block) pulled by string P. - **System B** (two blocks) pulled by string Q. - **System C** (two blocks) pulled by string R. a. Describe the motion of each of the systems A, B, and C. b. Draw vectors below to represent the acceleration of each system. | | | | |--------------|------------------------------|--------------------------------| | **System A** | **System B** | **System C** | | Acceleration vector for system A | Acceleration vector for system B | Acceleration vector for system C | c. Draw and label separate free-body diagrams for systems A, B, and C. | | | | |---------------------------|-------------------------------|-------------------------------| | **Free-body diagram for system A** | **Free-body diagram for system B** | **Free-body diagram for system C** | d. Rank the magnitudes of the net forces on systems A, B, and C. Explain. e. Write expressions for the tension in strings P and R in terms of T_Q, the tension in string Q. Show all your work. --- **Detailed Explanation of Diagrams:** The main diagram displays three systems arranged from left to right: 1. **System A** consists of a single block of mass m attached to string P. 2. **System B** consists of two blocks of mass m each connected by string Q. 3. **System C** is identical to system B, consisting of two blocks connected by string R. In the subsection for acceleration vectors
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