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    doraa's Avatar
    doraa Posts: 6, Reputation: 1
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    #1

    Mar 18, 2009, 09:19 AM
    how can i find the avrage speed ?
    Starting from a pillar, you run a distance 200 east (the x-direction) at an average speed of 5.0 , and then run a distance 280 west at an average speed of 4.0 to a post.
    Wuerschti's Avatar
    Wuerschti Posts: 30, Reputation: 1
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    #2

    Mar 18, 2009, 10:06 AM

    Include Units + Vector Diagram!

    200/5= 40 seconds

    280/4= 70 seconds

    Total distance(not displacement) (200+280)/(40+70seconds)

    480/110=4.363636363636
    doraa's Avatar
    doraa Posts: 6, Reputation: 1
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    #3

    Mar 18, 2009, 11:40 AM

    ThankXxXx ;p another Q ! What ABout the average velocity !??
    Wuerschti's Avatar
    Wuerschti Posts: 30, Reputation: 1
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    #4

    Mar 18, 2009, 04:03 PM

    sure velocity is the displacement divided by total time.

    80/110-=0.7272
    ScottGem's Avatar
    ScottGem Posts: 64,966, Reputation: 6056
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    #5

    Mar 18, 2009, 05:50 PM

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