Acceleration and Motion

Motion is any change in position over time. Acceleration is the rate at which an object changes its velocity. The picture below is of me kayaking at the beach. If I am paddling at a constant speed, then I have an acceleration of zero. This is because I am not getting any faster or slower. If I were to increase my velocity at a constant rate, then I would have a constant acceleration. If I were to decrease my velocity at a constant rate, then I would have a constant deceleration. Another important part of motion is relativity. Relative to the kayak, I am not moving. Relative to the water, the kayak and I are both moving at the same speed.