Constant Quantities:
* Speed: The object's speed remains the same.
* Radius: The distance from the center of the circle to the object remains constant.
* Magnitude of Velocity: The magnitude of the velocity, which is the speed, remains constant.
Changing Quantities:
* Velocity: Even though the speed is constant, the velocity is constantly changing direction. Velocity is a vector, and it has both magnitude (speed) and direction.
* Direction: The direction of the object's motion is constantly changing as it moves in a circle.
* Acceleration: The object is constantly accelerating towards the center of the circle. This is called centripetal acceleration.
Key Idea:
In uniform circular motion, the magnitude of the velocity (speed) is constant, but the direction of the velocity is always changing. This change in direction requires an acceleration, even though the speed doesn't change.
