1. Uniform Circular Motion
Physics I Class 05
Uniform Circular Motion

2. Newton’s Second Law - Yet Another Review!

3. Important Facts About Velocity and Acceleration Vectors

4. Circular Motion
When an object travels in a circle, its velocity is constantly changing (in direction at least).
That means the object has a non-zero acceleration even if it moves at constant speed.

5. Uniform Circular Motion

6. What is the Direction of Acceleration?

7. Centripetal Force

8. Example: A Rock on a String
Twirl a 1 kg rock attached to a string in a 1 m radius vertical circle. The speed is 4 m/sec. What forces act on the rock and what are the directions of those forces?

9. Using Newton’s Second Law to Solve Problems - Review

10. Case A: Rock at the Top of the Circle

11. Case B: Rock at the Bottom of the Circle

12. Normal Force - A Concept We Will Use in Today’s Activity

13. Class #5 Take-Away Concepts

14. Class #5 Problems of the Day

15. Answer to Problem 1 for Class #5

16. Class #5 Problems of the Day

17. Answer to Problem 2 for Class #5

18. Activity #5 Ferris Wheel Thrill Ride

19. Class #5 Optional Material “Centrifugal” Force?

20. Accelerated Frames of Reference

21. The Inertial Forces

22. Discussion Swinging a Water Bucket Overhead