About This Chapter
Rotation Motion Principles - Chapter Summary
When you watch the online videos in this chapter on rotational motion principles, you'll get information about rotational quantities and variables as well as angular velocity and acceleration. Explore the momentum and inertia of objects, and learn to understand Newton's first and second laws. You'll also have opportunities to practice solving equations that are related to inertia and momentum. Once you've viewed the video lessons, you could be able to:
- Examine the differences between translational and rotational motion
- Solve problems with rotational kinematics equations and torque
- Identify five kinematics variables
- Define rotational inertia, kinetic energy of rotation and the moment of inertia
- Explore work and power in physics
- Learn how to apply the conservation of momentum
- Distinguish between translational and rotational equilibrium
Experienced teachers outline the fundamentals of rotation motion principles throughout these online video lessons. Watch and take notes in your spare time via your mobile device or desktop computer. Written transcripts reflect the lessons, and video tags allow you to navigate them more quickly. The dashboard area of the lessons contains your recent activities along with course links and quizzes. You can also submit questions here by using the ask-an-expert feature.
1. Differences Between Translational & Rotational Motion
After watching this lesson, you'll be able to explain the difference between translational and rotational motion, explain how translational quantities are replaced by rotational ones in physics and apply Newton's First Law to rotation. A short quiz follows.
2. Rotational Kinematics: Definition & Equations
After watching this lesson, you should be able to explain what kinematics is, give a rotational variable that corresponds to each linear kinematic variable, and solve problems using rotational kinematics equations. A short quiz will follow.
3. Five Kinematics Quantities & the Big 5 Equations
After watching this lesson, you will be able to list the five kinematics variables in rotational motion and use the five equations of constant acceleration to solve problems involving rotational motion. A short quiz will follow.
4. Torque: Concept, Equation & Example
After watching this lesson, you will be able to explain what torque is conceptually and mathematically and use both the equation and Newton's First Law for rotation to solve problems involving torque. A short quiz will follow.
5. Rotational Inertia & Change of Speed
After watching this lesson, you will be able to explain what rotational inertia is, describe how it makes it harder to change the speed of rotation, and solve rotational inertia problems. A short quiz will follow.
6. Kinetic Energy of Rotation
After watching this lesson, you will be able to explain what kinetic energy of rotation is, provide the equation to calculate it, and solve simple kinetic energy of rotation problems. A short quiz will follow.
7. Rolling Motion & the Moment of Inertia
After watching this lesson, you should be able to figure out the moment of inertia of an object as it rolls down a ramp and compare it to a theoretical value. A short quiz will follow.
8. Work & Power in Rotational Motion
After watching this lesson, you will be able to explain what work and power are in the context of rotational motion and use equations to solve problems involving rotational work and power. A short quiz will follow.
9. Angular Momentum vs. Linear Momentum
After watching this lesson, you will be able to explain the difference between angular and linear momentum and solve problems using angular momentum equations. A short quiz will follow.
10. Conservation of Angular Momentum
After watching this video you will be able to explain what is meant by conservation of angular momentum. You will also be able to use this concept along with the equation to solve problems. A short quiz will follow.
11. Equilibrium: Translational & Rotational
Learn about the requirements for an object to be under translational or rotational equilibrium. Then work through a couple example problems that show how we can use translational and rotational equilibrium to find the forces acting on an object.
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