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Determine the Magnitude of the instantaneous Velocity

  1. Sep 30, 2014 #1
    1. The problem statement, all variables and given/known data
    Determine the Magnitude of the instantaneous velocity at T=5s
    Function is x=AT^2 + B
    A=2.1m/s^2
    B=2.8 M

    2. Relevant equations
    The previous questions answered on this problem are:
    AVG Velocity is 16.8
    Displacement is 33.6 from 3s to 5s
    3. The attempt at a solution
    I'm not sure how to find either magnitude or instantaneous velocity. I need it broken down to the most basic steps to understand.
     
  2. jcsd
  3. Sep 30, 2014 #2

    phinds

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    Do you understand what the relationship is between position and velocity? Have you taken calculus?
     
  4. Sep 30, 2014 #3
    I took calc and calc 2 about 4 years ago, I passed with A's but left school on military orders and have just gotten back into school. I forgot a lot of what I learned then.
     
  5. Sep 30, 2014 #4

    phinds

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    so, do you understand what the relationship is between position and velocity?
     
  6. Oct 1, 2014 #5
    No, no I do not.
     
  7. Oct 1, 2014 #6

    phinds

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    Well, do you think maybe my repeatedly asking you about it is a hint to look it up?

    I'm not trying to give you a hard time here, but part of what we do is try to help people learn how to get answers on their own, not spoon-feed answers. The relationship between position and velocity is extremely basic and one of the things that is generally brought up early in calculus so you really should study it a bit if you want to understand this kind of problem.
     
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