How many degrees-of-freedom does the system shown below has? The two pulleys have the identical mass, radius, and the moment of inertia.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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**Select the correct FBD for the pulleys.** Let \( s \) be the stretch in the springs and \( T \) be the tension in the rope.

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**Find the correct equation(s) of motion.**

(Note: FBD stands for Free Body Diagram. This text likely accompanies a diagram showing forces involved in a pulley system, illustrating the relationships between spring stretch and rope tension.)
Transcribed Image Text:**Select the correct FBD for the pulleys.** Let \( s \) be the stretch in the springs and \( T \) be the tension in the rope. --- **Find the correct equation(s) of motion.** (Note: FBD stands for Free Body Diagram. This text likely accompanies a diagram showing forces involved in a pulley system, illustrating the relationships between spring stretch and rope tension.)
**Title: Degrees of Freedom in a Mechanical Pulley System**

**Introduction**

Consider the system shown below. Answer Questions 6-11 based on this figure.

**Main Question**

- How many degrees-of-freedom does the system shown below have? 

The two pulleys have identical mass, radius, and moment of inertia.

**Diagram Description**

The diagram displays a mechanical pulley system consisting of a fixed and a moving pulley. Both pulleys have mass \( m \), radius \( R \), and moment of inertia \( I \). A spring with stiffness \( k \) is attached to a wall, and a cable runs over the pulleys, connecting them. The position and rotation of the pulleys are indicated as follows:

- \( x \): Vertical position of the moving pulley
- \( \theta \): Rotation of the moving pulley
- \( \phi \): Rotation of the fixed pulley

**Variables**

- \( x \): Vertical position of the moving pulley
- \( \theta \): Rotation of the moving pulley
- \( \phi \): Rotation of the fixed pulley
- \( m \): Pulley mass
- \( R \): Pulley radius
- \( I \): Moment of the pulley about its own center of mass
- \( k \): Spring stiffness
- \( T \): Cable tension

**Assumptions**

1. \( x = 0 \), \( \theta = 0 \), and \( \phi = 0 \) when the spring is undeformed.
2. The cables and springs have negligible mass.
3. There is no slip between the pulley and the cable.
4. Only two-dimensional planar motion is allowed.

**Explanation**

The diagram and accompanying variables illustrate the function and constraints of a mechanical system with two pulleys and a spring. The system's behavior is determined by understanding the degrees of freedom, the variables involved, and the assumptions grounding its analysis.
Transcribed Image Text:**Title: Degrees of Freedom in a Mechanical Pulley System** **Introduction** Consider the system shown below. Answer Questions 6-11 based on this figure. **Main Question** - How many degrees-of-freedom does the system shown below have? The two pulleys have identical mass, radius, and moment of inertia. **Diagram Description** The diagram displays a mechanical pulley system consisting of a fixed and a moving pulley. Both pulleys have mass \( m \), radius \( R \), and moment of inertia \( I \). A spring with stiffness \( k \) is attached to a wall, and a cable runs over the pulleys, connecting them. The position and rotation of the pulleys are indicated as follows: - \( x \): Vertical position of the moving pulley - \( \theta \): Rotation of the moving pulley - \( \phi \): Rotation of the fixed pulley **Variables** - \( x \): Vertical position of the moving pulley - \( \theta \): Rotation of the moving pulley - \( \phi \): Rotation of the fixed pulley - \( m \): Pulley mass - \( R \): Pulley radius - \( I \): Moment of the pulley about its own center of mass - \( k \): Spring stiffness - \( T \): Cable tension **Assumptions** 1. \( x = 0 \), \( \theta = 0 \), and \( \phi = 0 \) when the spring is undeformed. 2. The cables and springs have negligible mass. 3. There is no slip between the pulley and the cable. 4. Only two-dimensional planar motion is allowed. **Explanation** The diagram and accompanying variables illustrate the function and constraints of a mechanical system with two pulleys and a spring. The system's behavior is determined by understanding the degrees of freedom, the variables involved, and the assumptions grounding its analysis.
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