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Homework Help: Initial Velocity + Free Fall = Time

  1. Jan 7, 2015 #1
    1. The problem statement, all variables and given/known data

    Equation for the time of a free fall with an initial velocity?

    2. Relevant equations

    √ (2 ⋅ h / a )

    3. The attempt at a solution

    Is it √ (2 ⋅ h / via )

    Thanks for the help :)
  2. jcsd
  3. Jan 7, 2015 #2

    Andrew Mason

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    Science Advisor
    Homework Helper

    Your guess is not correct. Your first equation is correct if the object is at rest (vi=0). If initial velocity is not 0 you have to factor in a vit term and work t out from the quadratic equation:

    (1/2)gt2 + vit - h = 0

    (where h is the distance fallen).

    Last edited: Jan 7, 2015
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