How do I find average velocity?

1 Answer
Jun 10, 2015


You divide total distance by total time.


Sometimes you first have to work out separate distances or times and then add them before you can work out the average.

I travel to Amsterdam (which is not my favourite city) to deliver a parcel and I do the 60 km distance at an average speed of 60 km/h (last part of rush hour). After that I speed back to my favourite town at an average of 120 km/h.

My average speed on the whole trip is NOT :

#barv!=(60+120)//2# which would be 90 km/h

The correct calculation is as follows:
The trip to A took me 1 hour, the trip back only 1/2 hour.


This may go against your intuition, but remember, I spent much more time driving slow, than I did driving fast.