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    Samis454's Avatar
    Samis454 Posts: 3, Reputation: 1
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    #1

    Jan 15, 2009, 07:31 PM
    Average speed
    For each of the distances, find the average speed of the world champion runner.

    Distnace Time
    100m 9.8 seconds
    400m 43.2sec
    800m 1 min 41 sec
    1,500m 3 min 26 sec

    PLEASE HELP:confused:
    nike 1's Avatar
    nike 1 Posts: 167, Reputation: 16
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    #2

    Jan 15, 2009, 07:40 PM
    Divide meters by seconds. You will come up with meters run per second. Now do the math.
    nike 1's Avatar
    nike 1 Posts: 167, Reputation: 16
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    #3

    Jan 20, 2009, 07:06 PM
    Not very nice kid. I was only trying to help.
    sarnian's Avatar
    sarnian Posts: 462, Reputation: 9
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    #4

    Jan 20, 2009, 07:33 PM
    Samis : so you need the average speed :
    Way to get there : The average speed = meters per second (or kilometers per hour).

    Distance = 100m , and time = 9.8 seconds
    You have the distance per 9.8 seconds. But for average speed you need the distance per 1 second.
    So divide both terms with a factor 9.8 here, and you get...

    Distance = 1500m , and time = 3 min 26 sec
    How many sec = 3 min 26 sec ?
    Than divide 1500 by the number of sec and again you have the average speed

    Etc. etc. etc.

    Always be nice to those who try to help you...
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