A simple example of non-uniform acceleration would be a car that speeds up, slows down, or even stops at different intervals throughout the course of a journey. The acceleration of the car in this scenario is not constant and varies over time. When the car speeds up, its acceleration is positive, when it slows down, the acceleration is negative, and when it momentarily stops, the acceleration is zero. Each time there is a change in speed, the acceleration also changes, making it a non-uniform or varying acceleration.