* Velocity vs. Speed:
* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
* Speed is a scalar quantity, representing only the magnitude of velocity.
* Constant Velocity: Constant velocity means that both the speed *and* direction of motion remain unchanged over time.
* Varying Speed: If the speed changes, even slightly, then the velocity is no longer constant.
In simpler terms: Imagine a car driving down a straight road. If the car's speedometer shows a constant reading (meaning the car's speed is unchanging), and the car stays on the same path without turning, then its velocity is constant. If the car speeds up or slows down, even for a moment, its velocity is no longer constant.
