It is the speed or velocity of the object, measured by the distance covered over time. For instance, a car travelling at a constant 60 miles per hour, will travel 60 miles every hour (60MPH).
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Distance traveled by an object per unit of time is called speed. Speed is a scalar quantity. It is always greater than or equal to zero. Direction is not associated with this physical quantity. Speed at any instant is called instantaneous speed. Speedometer in vehicles show instantaneous speed viz. speed at any instant of time. Speed at any instant = derivative of traveled distance with respect to time = dx/dt.
A straight edge
The average speed of the object over the 15 seconds (s) is equal to the distance travelled divided by the time taken. Therefore the speed of the object = 27/15 or 1.8 metres per second (m/s) It is important to note that this is the average speed and not the speed at any particular point in time. The object's speed can also be expressed in km/h by multiplying our answer by 3.6. So object's speed = 1.8 * 3.6 = 6.48 km/h
It represents the speed of a moving object at any time covered by the graph.
The equation used to calculate the distance something travels is given below . we know, speed = distance /time . distance = speed X time in meters /km /or any other unit of length.