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    brennabmw's Avatar
    brennabmw Posts: 1, Reputation: 1
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    #1

    Jun 18, 2009, 09:25 AM
    I don't understand kinematics
    A jogger runs in a straight line with an average velocity of 5m/s for 4 min, and then with an average velocity of 4m/s for 3 min. (a) what is her total displacement? (b) what is her average velocity during this time?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jun 18, 2009, 09:28 AM



    Use that formula, then add the two values for displacement you get.



    And be sure that you are using the correct units. Velocity is seconds, convert every time into seconds.
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