# Ch 8: Circular Motion and Gravitation in Physics: Homework Help

### About This Chapter

## How it works:

- Identify which concepts are covered on your circular motion and gravitation homework.
- Find videos on those topics within this chapter.
- Watch fun videos, pausing and reviewing as needed.
- Complete sample problems and get instant feedback.
- Finish your circular motion and gravitation homework with ease!

## Topics from your homework you'll be able to complete:

- Uniform circular motion
- Formulas for speed, velocity and acceleration
- Chemical and dynamic equilibrium
- Kepler's laws of planetary motion
- Newton's law of universal gravitation
- Requirements for centripetal force
- Gravitational attraction of extended bodies
- Gravitational potential energy
- Work as an integral
- Periods and speeds of elliptical orbits
- Eccentricity of planetary orbits

### 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. Equilibrium: Chemical and Dynamic

Learn the definition of chemical equilibrium and how it is dynamic. Discover what the equilibrium constant is and how it shows whether the reaction favors the reactants or products. Learn how chemists designate equilibrium in an equation and how they show the difference in reaction rate.

### 5. Kepler's Three Laws of Planetary Motion

Find out about the interesting life and major contributions of Johannes Kepler. This lesson will also teach you how to find out how long it takes a planet to revolve around the sun!

### 6. 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.

### 7. 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.

### 8. 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.

### 9. Gravitational Potential Energy: Definition, Formula & Examples

In this lesson, you will learn what gravitational potential is, the equation we use to calculate it, and how to use that equation. We'll look at some real-life examples so you can see how it works. A short quiz will follow.

### 10. Work as an Integral

After watching this video, you will be able to solve calculus problems involving work and explain how that relates to the area under a force-displacement graph. A short quiz will follow.

### 11. Elliptical Orbits: Periods & Speeds

After watching this lesson, you will be able to explain what an elliptical orbit is and calculate the period and speed of an object in an elliptical orbit, if given enough information. A short quiz will follow.

### 12. Eccentricity & Orbits of Planets

After watching this lesson, you should be able to explain what eccentricity is and calculate the eccentricity of an orbit given relevant distance measurements. A short quiz will follow.

### 13. Objects Moving in Vertical Circles: Analysis & Practice Problems

After watching this video, you will be able to describe motion of an object moving in a vertical circle and derive and use equations for this motion in problem solving. A short quiz will follow.

### 14. Centroid & Center of Mass of a Semicircle

The centroid is the point at the exact center of an object. If the object has a uniform density, then the center of mass will be located at the centroid. In this lesson, learn how to find the centroid of a semicircle.

### 15. How to Calculate Tangential Velocity

In this lesson, you'll learn what information you need to calculate your tangential velocity. You'll also learn the easy formula that tells you just what to do with your values.

### 16. What is Tangential Velocity? - Definition & Formula

In this lesson, we define tangential velocity in terms of the radius of a circle and the time needed to make one complete revolution of the circle. We then extend this definition to include frequency and angular frequency.

### 17. How to Convert Angular Velocity to Linear Velocity

In this lesson, you'll explore the relationship between angular and linear velocity. You'll start with a refresher on how to find angular velocity, and then learn how to convert angular velocity into linear velocity.

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### Other Chapters

Other chapters within the High School Physics: Homework Help Resource course

- Introduction to Physics: Homework Help
- Vectors in Physics: Homework Help
- Kinematics in Physics: Homework Help
- Newton's Laws in Physics: Homework Help
- Work, Energy, & Power in Physics: Homework Help
- Linear Momentum in Physics: Homework Help
- Rotational Motion in Physics: Homework Help
- Oscillations in Physics: Homework Help
- Electrical Forces and Fields in Physics: Homework Help
- Potential and Capacitance in Physics: Homework Help
- Direct Current Circuits in Physics: Homework Help
- Magnetism in Physics: Homework Help
- Waves, Sound, and Light: Homework Help
- Atomic and Nuclear Physics: Homework Help
- Fluid Mechanics in Physics: Homework Help
- Thermal Physics & Thermodynamics: Homework Help
- Relativity & Quantum Theory in Modern Physics: Homework Help
- The Universe: Homework Help
- Physics Lab - Motion: Homework Help
- Physics Lab - Matter & Light: Homework Help
- Physics Lab - Electricity: Homework Help