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Homework Help: Initial Velocity without acceleration given.

  1. Sep 14, 2009 #1
    1. The problem statement, all variables and given/known data
    An antelope moving with constant acceleration covers the distance 74.0m between two points in time 7.70s . Its speed as it passes the second point is 14.6 m/s.

    2. Relevant equations
    What is its speed at the first point?

    What is the acceleration?

    3. The attempt at a solution

    I dont know how to type in the formula in here any help? Im kinda confused on how to substitue the formula.
  2. jcsd
  3. Sep 14, 2009 #2
    Hi c0ld

    To type formula here, we use Latex. I don't know if there is a thread somewhere here about Latex tutorial, maybe you can use google.

    About your question, the formulas for kinematics :

    [tex]1) v = u+at[/tex]

    [tex]2) s=ut+\frac{1}{2}at^2[/tex]

    [tex]3) v^2=u^2+2as[/tex]

    v = final speed
    u = initial speed

    Apply those formulas and you'll find the answer :smile:
  4. Sep 14, 2009 #3
    What does s mean? Displacement?

    First point should be initial velocity. All the formulas you posted require acceleration.
    Last edited: Sep 14, 2009
  5. Sep 14, 2009 #4
    Got the problem! It was ((2 * Displacement) / t) - final velocity
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