Velocity is defined as displacement per unite time.
velocity(v)= Displacement(s)/Time(t)
Displacement is measured in 'metre' and time in second in SI system. Thus velocity is measured in m/s. It is vector quantity. Suppose the body moves 10m due east in straight line in 2 seconds. In each one second, it moves by 5m in straight line due east. This can be written as 5m/s
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