Speed -

The measurement of distance travelled by a body per unit time is called speed.

Speed (v) = Distance Travelled/Time Taken = s/t

SI unit = m/s (meter/second)

Average Speed - The average speed of a body is the total distance travelled by the total time taken to cover this distance.

Average speed= Total Distance travelled / Total Time taken

EXAMPLE 1 - You walk 60 m at a speed of 3m/s and then run 140m at a speed of 7m/s along a straight track. Find the average speed?

EXAMPLE 2 - What will be the speed of body in m/s and km/hr if it travels 40 kms in 5 hrs ?

 

 

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