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physics

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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 and then back along the line from B to A at a constant speed of 2.70 m/s.
(a) What is her average speed over the entire trip?

  • physics - ,

    She is travelling the same distance at each speed, so it doesn't matter what that distance is. You simply find the average of the two speeds.

  • physics - ,

    The answer is NOT the average of 2.7 and 4.9. I answered this question earlier. Why are you posting it again?
    http://www.jiskha.com/display.cgi?id=1283304487

  • physics - ,

    Vectors and have equal magnitudes of 49.0. If the sum of and is the vector 16.3 , determine the angle between and .

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