I took this picture of a car being driven down a street near my house to domnstrate acceleration. now, the car had what i thought to be a constant velocity. however, acceleration happens anytime you either change speeed (which this car didnt) or direction. as this car went around the curve, he accelerated as the vector of his velocity changed. so, this ties into both the acceleration of past lessons and the current work with vectors and demonstrates the relationship between acceleration and speed and direction to vectors.