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2. An L-bracket is composed of two identical thin sticks each with mass M and length L. The bracket rotates about the vertical at constant angular speed co and is supported by a bearing at the bottom, point A, as well as by a massless cord at the top of the bracket. The cord is parallel to the xy-plane and rotates with the bracket. Determine the tension in the cord.

2. An L-bracket is composed of two identical thin sticks each with mass M and length L. The bracket rotates about the vertical at constant angular speed co and is supported by a bearing at the bottom, point A, as well as by a massless cord at the top of the bracket. The cord is parallel to the xy-plane and rotates with the bracket. Determine the tension in the cord.

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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**Problem 2: Analysis of an L-Bracket System** An L-bracket is composed of two identical thin sticks, each with mass \( M \) and length \( L \). The bracket rotates about the vertical axis at a constant angular speed \( \omega \) and is supported by a bearing at the bottom, referred to as point \( A \), as well as by a massless cord at the top of the bracket. The cord remains parallel to the xy-plane and rotates with the bracket. The task is to determine the tension in the cord. --- **Visual Explanation:** No specific graphs or diagrams are provided in the text. However, imagine the L-bracket as a system of two sticks forming a right angle. The setup revolves around a vertical axis with a support at the base (point \( A \)) and a supporting cord at the top, keeping the structure parallel to the xy-plane during rotation. **Key Concepts:** - **Rotation Dynamics**: Understanding how angular speed \( \omega \) influences the forces on the bracket. - **Support Forces**: Identifying the role of the bearing and the cord in maintaining structural integrity. - **Tension Calculation**: Applying principles from physics to find the cord's tension. **Instructions for Solving the Problem:** 1. **Analyze Forces**: Consider centripetal force due to rotation and how it affects tension in the cord. 2. **Apply Equations of Motion**: Use the principles of rotational dynamics and equilibrium to set up equations. 3. **Simplify and Solve**: Isolate the variable representing tension and calculate its value using known quantities like mass \( M \), length \( L \), and angular speed \( \omega \). This problem is an excellent exercise for students studying rotational dynamics and forces in physics.
Transcribed Image Text:**Problem 2: Analysis of an L-Bracket System** An L-bracket is composed of two identical thin sticks, each with mass \( M \) and length \( L \). The bracket rotates about the vertical axis at a constant angular speed \( \omega \) and is supported by a bearing at the bottom, referred to as point \( A \), as well as by a massless cord at the top of the bracket. The cord remains parallel to the xy-plane and rotates with the bracket. The task is to determine the tension in the cord. --- **Visual Explanation:** No specific graphs or diagrams are provided in the text. However, imagine the L-bracket as a system of two sticks forming a right angle. The setup revolves around a vertical axis with a support at the base (point \( A \)) and a supporting cord at the top, keeping the structure parallel to the xy-plane during rotation. **Key Concepts:** - **Rotation Dynamics**: Understanding how angular speed \( \omega \) influences the forces on the bracket. - **Support Forces**: Identifying the role of the bearing and the cord in maintaining structural integrity. - **Tension Calculation**: Applying principles from physics to find the cord's tension. **Instructions for Solving the Problem:** 1. **Analyze Forces**: Consider centripetal force due to rotation and how it affects tension in the cord. 2. **Apply Equations of Motion**: Use the principles of rotational dynamics and equilibrium to set up equations. 3. **Simplify and Solve**: Isolate the variable representing tension and calculate its value using known quantities like mass \( M \), length \( L \), and angular speed \( \omega \). This problem is an excellent exercise for students studying rotational dynamics and forces in physics.
The diagram illustrates a 3D coordinate system with axes labeled X, Y, and Z. At point A, located at the intersection of the X and Y axes, a structure begins with a vertical line extending upwards parallel to the Z-axis. This vertical line is labeled B at the top, where it connects to a horizontal line or "cord." The horizontal line extends perpendicular to the vertical line towards the Y-axis. The Z-axis is marked with an arrow indicating a counterclockwise rotational motion, labeled with the angular velocity \(\omega\). Key elements in the diagram: - **Axes**: X, Y (horizontal plane), and Z (vertical axis). - **Vertical Line**: Originating at point A, labeled B at the top end. - **Cord**: A horizontal line at the top, parallel to the Y-axis. - **Rotational Arrow**: Indicates the direction of rotation around the Z-axis. This diagram can represent a mechanical system or a physics problem dealing with rotational motion.
Transcribed Image Text:The diagram illustrates a 3D coordinate system with axes labeled X, Y, and Z. At point A, located at the intersection of the X and Y axes, a structure begins with a vertical line extending upwards parallel to the Z-axis. This vertical line is labeled B at the top, where it connects to a horizontal line or "cord." The horizontal line extends perpendicular to the vertical line towards the Y-axis. The Z-axis is marked with an arrow indicating a counterclockwise rotational motion, labeled with the angular velocity \(\omega\). Key elements in the diagram: - **Axes**: X, Y (horizontal plane), and Z (vertical axis). - **Vertical Line**: Originating at point A, labeled B at the top end. - **Cord**: A horizontal line at the top, parallel to the Y-axis. - **Rotational Arrow**: Indicates the direction of rotation around the Z-axis. This diagram can represent a mechanical system or a physics problem dealing with rotational motion.
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Let ω denote the angular speed, T denote the string's tension, M denote the mass of each rod, L denote the length of each rod.

 

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