What is her average speed over the entire trip? What is her average velocity over the entire trip?

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1 Answer
Feb 9, 2018

Let the distance between A B be x m.

So time required to travel from A toB @ 5.2 m/s will be =x/5.2s

Similarly time required to travel from B to A @ 2.9 m/s will be =x/2.9s

Hence the average speed

="total distance traveled"/"total time"

=(2x)/(x/5.2+x/2.9)

=(2*2.9*5.2)/8.1=3.721 m/s

Net displacement during total time being zero the average velocity will be zero