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Physics q - need help

  1. Sep 21, 2005 #1

    xcutezix

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    physics PLEASE HELP :(

    please help me i really dont know how to do this question for physics :confused: :confused: :confused: :eek:

    A cyclist travels to work at an average speed of 3 metres/sec and returns at an average speed of 9 metres/sec what is the average speed of the entire journey??

    the answer is not 6 and it is not as simple as speed= distance/time please help :frown:
     
    Last edited: Sep 21, 2005
    xcutezix, Sep 21, 2005
  2. jcsd
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  3. Sep 21, 2005 #2

    Doc Al

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    Staff: Mentor

    The average speed is found by dividing the total distance by the total time of travel. (Since you aren't given the distance, just make one up.)
     
    Doc Al, Sep 21, 2005
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