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