Physics, 04.09.2019 17:30 paolaviviana

a person walks first at a constant speed of 4.90 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.90m/s.
(a) what is her average speed over the entire trip? (in m/s)

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a person walks first at a constant speed of 4.90 m/s along a straight line from point a to point b a...