Here's why:
* Velocity is a measure of both speed and direction.
* Acceleration is the rate at which velocity changes. This means it can involve:
* Changing speed: Going faster or slower.
* Changing direction: Turning or curving.
* Both: A combination of changing speed and direction.
Think of it this way: If you're driving a car and you press the gas pedal, you're increasing your speed, which means you're accelerating. If you turn the steering wheel, you're changing your direction, which also means you're accelerating.
