1 / 14

Chapter 7 Rotational Motion & Law of Gravity

Chapter 7 Rotational Motion & Law of Gravity. Section 7-2 Tangential and Centripetal Acceleration. Tangential Speed. Objects in circular motion have tangential speed. Tangential Speed of any point rotating about an axis is instantaneous linear speed of that point.

ebonham
Télécharger la présentation

Chapter 7 Rotational Motion & Law of Gravity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 7Rotational Motion & Law of Gravity Section 7-2 Tangential and Centripetal Acceleration

  2. Tangential Speed • Objects in circular motion have tangential speed. • Tangential Speed of any point rotating about an axis is instantaneous linear speed of that point.

  3. Example: Tangential Speed • Horses on a carousel move at the same angular speed but differenttangential speeds.

  4. Tangential Speed • Tangential Speed = distance from axis x angular speed. • Vt = r ω • Where r is Radius and ω is instantaneous angular speed (speed at that moment)

  5. Practice with Sample 7E • Pg. 255

  6. Tangential Acceleration • Tangential Acceleration is tangent to the circular path. • Tangential acceleration = distance from axis x angular acceleration • at = r α • Where r is Radius and αis instantaneous angular acceleration.

  7. Practice with Sample 7F • Pg. 256

  8. Centripetal Acceleration • ‘Center seeking’ acceleration. • Circular motion acceleration is due to change in direction.

  9. Example: Centripetal Acceleration • Tangential and Centripetal accelerations are perpendicular.

  10. Tangential Vs. Centripetal Acceleration • Tangential and Centripetal accelerations are not the same. • Tangential Component of acceleration is due to changing speed. • Centripetal component of acceleration is due to changing direction.

  11. Formula: Centripetal Acceleration • Centripetal Acceleration = (tangential speed)2 / distance from axis • ac = vt2 / r • ac = r ω2

  12. Sample Problem 7G • Pg. 258

  13. Assignment • Practice 7E pg. 255 2-4 • Practice 7F pg. 256 2-3 • Practice 7G 2-5 • Eight problems Total!!

More Related