General objective of this lecture is to present on Speed and Velocity. Speed is a scalar quantity and can be an average or instantaneous value. On the other hand, velocity is a vector quantity; it is direction-aware. For example – If you drove to Vancouver (approximately 400 km away) in 4 hours your average speed would be 100km/hr. But at any given time your instantaneous speed could be more or less than 100 km/hr. Average velocity is calculated in the same manner as average speed only instead of distance we use the displacement (a vector).