Average speed is defined as the total distance travelled by the body in total time i.e. Average Speed=Total timeTotal distance It is a scalar quantity. Its unit is m/s.
Speed is rate of change of distance,it is the measurement of how fast or slow objects move, can be given by formula, Speed=TimeDistance S.I unit of speed is m/s
Speed by distance moved and time taken by an object
Example : During inter school running race competition , Shivam completed the race of 200 m in 120 seconds, where as the winner of the race Anubhav completed it in just 80 seconds.What would be the required speed of Shivam to beat Anubhav? Solution: Speed of Shivam s1=timedistance=120200=1.67m/s Speed of Anubhav s2=timedistance=80200=2.5m/s Hence to win the race speed of shivam should have been more than 2.5m/s