1. Circular Motion
Chapter

2. Rotation
Spin around an internal axis
Earth rotates around an axis

3. Revolution When an object turns around an external axis
Example: Planets revolve around the sun.

4. Circular Motion Rotational Speed Linear (Tangential) speed
Number of rotations per minute
Linear (Tangential) speed
speed of an object moving along the circular path

5. At the center of the rotating circle, linear (tangential) speed is zero
But there is a rotational speed.

6. The rotational speed at points A and B are the same (they will have the same number of rotations per minute)
Linear (tangential) speed is dependent on distance from center and rotational speed

7. If the car on the outside is twice the distance from the center of the circular track than the car on the inside than its linear speed is twice that of the inner car.

8. Circular Motion & Acceleration?
If an object has uniform circular motion (constant linear and tangential speed) does it have acceleration?

9. Since the acceleration is dependent on both speed (which is constant) and direction, uniform circular motion always has acceleration.