05-1 Physics I Class 05 Uniform Circular Motion. 05-2 Newton’s Second Law - Review.

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Presentation transcript:

05-1 Physics I Class 05 Uniform Circular Motion

05-2 Newton’s Second Law - Review

05-3 Important Facts About Velocity and Acceleration Vectors

05-4 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.

05-5 Uniform Circular Motion

05-6 What is the Direction of Acceleration?

05-7 Centripetal Force

05-8 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?

05-9 Using Newton’s Second Law to Solve Problems - Review

05-10 Case A: Rock at the Top of the Circle

05-11 Case B: Rock at the Bottom of the Circle

05-12 Normal Force - A Concept We Will Use in Today’s Activity

05-13 Discussion Swinging a Water Bucket Overhead

05-14 Class #5 Take-Away Concepts

05-15 Activity #5 Ferris Wheel Thrill Ride

05-16 Class #5 Optional Material “Centrifugal” Force?

05-17 Accelerated Frames of Reference

05-18 The Inertial Forces