# Ch 8: Equilibrium and Elasticity

### About This Chapter

## Equilibrium and Elasticity - Chapter Summary and Learning Objectives

Equilibrium and elasticity are key introductory concepts in physics. In this series of lessons, you'll learn about different types of equilibrium and their characteristics. You'll then be able to apply this knowledge to understanding how simple machines work, how factors like gravity affect equilibrium and elasticity and how to solve problems where you'll need to measure equilibrium and elasticity. In these lessons, you'll learn things like:

- Types of equilibrium
- Types of stability
- Types of simple machines
- How to solve equations that include calculating equilibrium and elasticity

Video | Objective |
---|---|

Equilibrium: Translational & Rotational | Describe types of equilibrium and the conditions they present. |

Stability & Center of Gravity | Define types of stability and how they relate to gravity. |

Statics Problem-Solving Methods & Applications | Explain how to solve static equilibrium equations. |

Simple Machines: Lever, Inclined Plane & Pulley | Identify and explain the mechanical advantages of simple machines. |

Tensile and Compressive Stress and Strain Equations | Describe elastic modulus and Hooke's Law. |

Shear and Bulk Stress and Strain Equations | Describe equations and moduli related to the concepts of shear, bulk stress and strain. |

### 1. Equilibrium: Translational & Rotational

Equilibrium is the state of being balanced physically, and it is an important factor for being in motion. Explore the relationship between motion and equilibrium, focusing on the two types: translational and rotational.

### 2. Stability & Center of Gravity

Without stability, objects would constantly be prey to the negative effects of gravity and fall over with the slightest applied force. Learn about the definition of stability, its relationship with an object's center of gravity, and the three states of stability.

### 3. Statics Problem-Solving Methods & Applications

A statics problem is solved when the sums of the forces or torques manipulating an object in static equilibrium are determined. Learn more about static equilibrium and the methods and applications of the seven-step process used to solve statics problems.

### 4. Simple Machines: Lever, Inclined Plane & Pulley

Simple machines make use of mechanical means to apply force and perform work. Learn about different types of simple machines such as the lever, inclined plane, and pulley, and determine the formula for their mechanical advantage.

### 5. Tensile and Compressive Stress and Strain Equations

Tensile and compressive stress and strain equations are used to find out how stiff a material is. Learn about stress and strain, tension and compression, elastic modulus and Hooke's law, and the stress-strain curve.

### 6. Shear and Bulk Stress and Strain Equations

Bulk stress causes a change in the volume of the object or medium and is caused by forces acting on the body from all directions, perpendicular to its surface. Shear stress is caused by forces acting along the object's two parallel surfaces. Learn more about bulk and shear stress, strain equations and what shear modulus is.

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### Other Chapters

Other chapters within the UExcel Physics: Study Guide & Test Prep course

- Introduction to Physics
- Vectors
- Kinematics
- Force and the Laws of Motion
- Work and Energy in Physics
- Linear Momentum in Physics
- Rotational Motion
- Waves, Sound, and Light
- Fluids in Physics
- Thermodynamics in Physics
- Electrostatics
- Circuits in Physics
- The Physics of Magnetism
- Wave Optics
- Relativity
- Modern Physics & Nuclear Physics
- UExcel Physics Flashcards