In order for an object to have velocity, every step must go farther away from its starting point. If a man is hopping from one foot to the other as fast as he can but remains in one spot, he has speed but zero velocity. If something is moving back and forth and always returns to its original position, it has speed but zero velocity because it doesn’t change position. Velocity is the rate which an object changes its position. An object that is not moving has zero speed. Something moving slowly, like a walking man, will travel a very short distance in the same amount of time. ![]() For example, something moving very fast, like a train, can cover a large distance in a short time. ![]() Speed relates to how fast something is moving and how fast it moves over a distance. ![]() ![]() Although most people speak of speed and velocity as the same thing, they have distinct and different meanings.
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