The speed of a moving object can be calculated if the distance travelled and the time taken are known. The faster an object moves, the steeper the line representing it on a distance-time graph.
The velocity of an object is its speed in a particular direction. In velocity-time graphs sloping sloping lines represent steadily increasing or decreasing velocities. Horizontal lines represent movement at constant velocities.
When an object moves in a straight line at a steady speed you can calculate its speed if you know how far it travels and how long it takes.
Speed (metre per second, m/s) = distance travelled (metre, m)
time taken (second,s)
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