Constant acceleration refers to a situation where an object's velocity changes at a steady rate over time. This means that the object's speed and/or direction are changing consistently.

Key Characteristics:

* Uniform change in velocity: The object's velocity increases or decreases by the same amount in each equal time interval.

* Constant rate of change: The acceleration remains the same throughout the motion.

* Straight-line motion: Constant acceleration typically results in motion along a straight line, although it can occur in curved paths under specific conditions.

Mathematical Representation:

Acceleration is represented by the symbol a and is defined as the change in velocity (Δv) divided by the change in time (Δt):

```

a = Δv / Δt

```

Examples of Constant Acceleration:

* Free fall: An object falling under the influence of gravity experiences constant acceleration due to the Earth's gravitational pull.

* Car accelerating from rest: A car accelerating smoothly from rest to a certain speed experiences constant acceleration.

* Ball rolling down a ramp: A ball rolling down a ramp experiences constant acceleration due to the force of gravity acting on it.

Note:

* Negative acceleration indicates that the object is slowing down (decelerating).

* Zero acceleration means the object is moving at a constant velocity.

* Constant acceleration is a simplified model, and in real-world situations, acceleration is often not perfectly constant. However, the concept is useful for understanding and analyzing many physical phenomena.