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

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Answer 1 · 2018-02-09T08:59:20

Let the distance between A B be $x$ m.

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

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

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