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Uniform acceleration/ catch up question

  1. Feb 16, 2010 #1
    Having trouble getting the formula for this question.

    1. During a football games, Igor is 8.0m behind Brian and is running at 7.0m/s when Brian catches the ball and starts to accelerate away at 2.8m/s^2 at rest.
    Will Igor catch Brian? If so, after how long?
    How far down the field will Brian have run?

    2. Involves 5 uniform acceleration equations.

    3. d= (vi)(t) + 1/2(a)(t^2)
    8.0m +(t)(7.0m/s)=d
    8.0 + (t)(7.0m/s)=(vi)(t) + 1/2(a)(t^2)????

    Getting the formula is really confusing me. I realize that Igor is 8.0m behind Brian but I get confused at that moment where I must insert that into the equation.
  2. jcsd
  3. Feb 16, 2010 #2
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