# Uniform Circular Motion

## Presentation on theme: "Uniform Circular Motion"— Presentation transcript:

Uniform Circular Motion
Physics I Class 12 Uniform Circular Motion

Newton’s Second Law - Yet Another Review!

Uniform Circular Motion

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.

Important Facts About Velocity and Acceleration Vectors

What is the Direction of Acceleration?

“Centripetal Force” “Centrifugal 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 #12 Take-Away Concepts

Class #12 Problems of the Day

Class #12 Problems of the Day

Activity #12 Ferris Wheel Thrill Ride

Class #12 Optional Material “Centrifugal” Force?

Accelerated Frames of Reference

The Inertial Forces

Discussion Swinging a Water Bucket Overhead