# Ch 7: AP Physics 1: Motion

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### About This Chapter

## AP Physics 1: Motion - Chapter Summary and Learning Objectives

While you probably know that Earth orbits the sun and that the mass of the Earth creates a force called gravity, you may not know the physics behind these facts. In this chapter, you'll learn about uniform circular motion, which is when an object follows a circular path. You'll learn various formulas you need to calculate variables involved with this type of motion. Through the work of Isaac Newton, you'll look at the gravitational pull of the Earth and learn how this type of attraction works on large and small scales. This chapter is designed to teach you:

- Formulas to calculate circular motion
- The forces involved in circular motion
- Gravitational attraction calculations
- Importance of the gravitational constant

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

Uniform Circular Motion: Definition and Mathematics | Understand the movement of an object along the circumference of a circle and the related calculations. |

The Centripetal Force Requirement: Definition, Examples, & Problems | Take a look at this force that makes a body follow a curved path. |

Newton's Law of Gravitation: Definition and Application | Learn about Newton's famous discovery about the relationship of mass and force. |

Gravitational Attraction and Extended Body | See how gravitational attraction works and what changes when multiple parts are involved. |

Cavendish and the Value of G: Gravity Experiment and Significance | Explore how Cavendish sought to weigh the Earth and his measurement of the gravitational constant (G). |

### 1. Uniform Circular Motion: Definition & Mathematics

After watching this lesson, you will be able to explain what uniform circular motion is, in terms of both acceleration and forces. You will also be able to use equations for centripetal force and acceleration to solve problems. A short quiz will follow.

### 2. Speed and Velocity: Concepts and Formulas

Did you know that an object's speed and velocity may not be the same? This lesson describes the concepts of speed and velocity relating to objects in motion. We'll look at a specific example to help learn how to calculate both speed and velocity.

### 3. What is Acceleration? - Definition and Formula

This lesson describes the difference between speed, velocity and acceleration. Examples are used to help you understand the concept of acceleration and learn to calculate acceleration with a mathematical formula.

### 4. Centripetal Force: Definition, Examples & Problems

After watching this video, you should be able to explain what centripetal force is, identify the centripetal force in a particular situation, and solve problems using the centripetal force equation. A short quiz will follow.

### 5. Newton's Law of Gravitation: Definition & Examples

This lesson explains how gravity works mathematically and teaches you how to use Newton's Law of Gravitation to solve problems. A short quiz will follow.

### 6. Gravitational Attraction of Extended Bodies

After watching this lesson, you will be able to explain what an extended body is, understand the derivation for the force of gravity between a point charge and a long, thin bar and solve problems using the result of that derivation.

### 7. Cavendish's Gravity Experiment & the Value of G

After watching this lesson, you will be able to explain what the gravitational constant is and explain how the Cavendish Experiment can be used to figure out the value of big-G. A short quiz will follow.

### 8. Gravitational Field: Definition & Formula

This lesson defines what a gravitational field is and some practical examples encountered in the real world. We also develop the equations governing the gravitational field and explain what the units of measurement mean.

### 9. Graphing the Motion of Objects: Physics Lab

After watching this lesson, you will be able to measure the motion of an object and plot position-time and velocity-time graphs based on your data. A short quiz will follow.

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### Other Chapters

Other chapters within the AP Physics 1: Exam Prep course

- AP Physics 1: Systems
- AP Physics 1: Vectors
- AP Physics 1: Kinematics
- AP Physics 1: Newton's Laws
- AP Physics 1: Work, Energy, & Power
- AP Physics 1: Linear Momentum
- AP Physics 1: Oscillations
- AP Physics 1: Rotational Motion
- AP Physics 1: Electrical Forces and Fields
- AP Physics 1: Direct Current Circuits
- AP Physics 1: Mechanical Waves