* Acceleration is about change in velocity. Velocity has two components: speed (how fast you're going) and direction.
* Changing direction means changing velocity. Even if your speed remains constant, if you're changing direction, you're changing your velocity, and therefore accelerating.
Examples:
* Driving in a circle at a constant speed: You're accelerating because you're constantly changing direction.
* A satellite in orbit: It's constantly falling towards Earth, but its horizontal velocity keeps it in orbit, resulting in a constant change in direction, and thus acceleration.
Key takeaway: Acceleration is about change in velocity, not just change in speed. You can be accelerating if you're changing direction, even if your speed remains the same.
