Speed
Average speed is distance travelled divided by elapsed time.
Velocity
Velocity includes direction as well as magnitude.
Acceleration
Acceleration means velocity is changing—speeding up, slowing down or changing direction.
Graphs tell the story
Position-time and velocity-time graphs can reveal motion more clearly than a list of numbers.
This page explains scientific concepts for general learning. It does not replace laboratory safety procedures, professional engineering guidance, or individualized medical advice.