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    I have attached the question:

    Name:  Screen Shot 2013-04-06 at 22.08.25.png
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    I can do each question apart from d.

    Answers to each (may help?)
    a. 9.43ms^-1
    b. (2+5t)i + (1+8t)j
    c. 1.6s

    for d, I have subbed in 1.6s to find the position vector of the ball, to get
    10i + 13.8j

    I know I need to find the distance of the second runner, however I don't know how to do this?

    Any help would be greatly appreciated!
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    (Original post by L1000)
    I have attached the question:

    Name:  Screen Shot 2013-04-06 at 22.08.25.png
Views: 271
Size:  82.9 KB

    I can do each question apart from d.

    Answers to each (may help?)
    a. 9.43ms^-1
    b. (2+5t)i + (1+8t)j
    c. 1.6s

    for d, I have subbed in 1.6s to find the position vector of the ball, to get
    10i + 13.8j

    I know I need to find the distance of the second runner, however I don't know how to do this?

    Any help would be greatly appreciated!
    The question tells you where the player starts running from (point B) and you have worked out where he finishes above.

    So you can find his displacement from that.

    This is consistent with the fact the player is running due north, as his velocity has no i component.
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    (Original post by fayled)
    The question tells you where the player starts running from (point B) and you have worked out where he finishes above.

    So you can find his displacement from that.
    Sorry that was really stupid, thank you for your help
 
 
 
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Updated: April 6, 2013
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