* Acceleration: Acceleration is the rate of change of velocity over time. It's how quickly an object's speed and/or direction is changing.

* Constant: This means the acceleration stays the same throughout the motion. It doesn't increase or decrease.

Imagine these examples:

* Car accelerating from a stoplight: If the car's acceleration is constant, it will gain the same amount of speed every second.

* Ball falling straight down: Ignoring air resistance, a ball falling from a height has a constant downward acceleration due to gravity. It gains speed at a constant rate as it falls.

Key points about constant acceleration:

* Velocity is changing: Even though the *rate* of change is constant, the velocity itself is still changing.

* Uniform motion: Constant acceleration doesn't mean the object is moving at a constant speed. It means the change in speed is consistent.

* Straight line motion: In most cases, constant acceleration implies the object is moving in a straight line. However, it can also happen in circular motion if the speed is changing at a constant rate.

Equations of motion:

There are specific equations of motion that are used to describe constant acceleration scenarios. They relate displacement, velocity, acceleration, and time.

Let me know if you want a deeper dive into those equations or specific examples of constant acceleration!