physics

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A person walks first at a constant speed of 4.50 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 3.00 m/s.
(a) What is her average speed over the entire (b) What is her average velocity over the entire trip?
trip?

  • physics -

    Let A to B be 100 miles, and B to A be 100 miles.
    Distance=200 miles
    So what is the time
    timeAB=100/4.5 timeBA=100/3
    add the times to get total time
    average velocity=distance/totaltime
    Velocity=displacement/time
    = (finalposition-initialposition)/time

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