Uniform Circular Motion

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Uniform Circular Motion

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Presentation transcript:

Uniform Circular Motion Physics I Class 05 Uniform Circular Motion

Newton’s Second Law - Yet Another Review!

Important Facts About Velocity and Acceleration Vectors

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.

Uniform Circular Motion

What is the Direction of Acceleration?

Centripetal Force

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?

Using Newton’s Second Law to Solve Problems - Review

Case A: Rock at the Top of the Circle

Case B: Rock at the Bottom of the Circle

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

Class #5 Take-Away Concepts

Class #5 Problems of the Day

Answer to Problem 1 for Class #5

Class #5 Problems of the Day

Answer to Problem 2 for Class #5

Activity #5 Ferris Wheel Thrill Ride

Class #5 Optional Material “Centrifugal” Force?

Accelerated Frames of Reference

The Inertial Forces

Discussion Swinging a Water Bucket Overhead