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Initial velocity can be measured in the same units as any other velocity. In SI, that would be meters per second, but often km / hour are used, or (in a minority of countries) feet/second or miles/hour.
Feet per second is a unit of velocity, but not necessarily the same thing. Velocity could be in meters per hour or feet per second could be a measure of speed, which does not take direction into account, as velocity does.
Velocity is basically speed. Take the distance traveled and divide by the time. (Distance/Time).common units are:Miles per Hour (MPH)Meters per second (m/s)Kilometers per hour (KPH)feet per second (fps)
Velocity = Change in position/ Change in timeVelocity is a vector quantity meaning it has direction and magnitude. Most common measurements include:meters per second (m/s)feet per second (ft/s)and miles per hour (mi/h)
The two measures are of the same dimensions and, mathematically, are equivalent. They are both measures of acceleration. However, conceptually, there is a difference. The first is concerned with the change, per second, in the velocity when the latter is measured in kilometres per hour. The second is concerned with the change, per hour, in the velocity when the latter is measured in kilometres per second.