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**Uniform Circular Motion**

Physics I Class 12 Uniform Circular Motion

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**Newton’s Second Law - Yet Another Review!**

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**Uniform Circular Motion**

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**Acceleration in 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.

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**Important Facts About Velocity and Acceleration Vectors**

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**What is the Direction of Acceleration?**

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**“Centripetal Force” “Centrifugal Force”**

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**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?

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**Using Newton’s Second Law to Solve Problems - Review**

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**Case A: Rock at the Top of the Circle**

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**Case B: Rock at the Bottom of the Circle**

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

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**Class #12 Take-Away Concepts**

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**Class #12 Problems of the Day**

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**Class #12 Problems of the Day**

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**Activity #12 Ferris Wheel Thrill Ride**

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**Class #12 Optional Material “Centrifugal” Force?**

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**Accelerated Frames of Reference**

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The Inertial Forces

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**Discussion Swinging a Water Bucket Overhead**

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