* Acceleration is the rate of change of velocity. This means that acceleration describes how quickly the velocity is changing.

* In freefall, an object experiences constant acceleration due to gravity. This acceleration is approximately 9.8 m/s² near the Earth's surface.

* Constant acceleration does not mean constant velocity. An object in freefall starts with an initial velocity (which might be zero), and its velocity increases steadily as it falls due to the constant acceleration.

Think of it this way:

* Imagine you drop a ball. At the moment you release it, its velocity is zero.

* As it falls, its velocity increases. The ball gets faster and faster.

* Even though the acceleration due to gravity is constant, the ball's velocity is changing.

Key takeaway: In freefall, an object has a constant acceleration, but its velocity is constantly increasing.