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Homework Help: Differentiate y component of velocity wrt time

  1. May 11, 2012 #1
    1. The problem statement, all variables and given/known data
    A ball is thrown with an angle of 45 degrees to the horizontal by a person standing on the ground.

    The y-component of the velocity of ball in projectile motion is differentiated with respect to time. i.e. dv/dt of the y-component of velocity.

    2. Relevant equations

    3. The attempt at a solution

    Does this equal -g? (not g)
  2. jcsd
  3. May 11, 2012 #2


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    Hi ZedCar! :smile:
    you mean,

    d/dt of the y-component of velocity

    or the y-component of dv/dt

    or d/dt of vy :wink:
    yes :smile:
  4. May 11, 2012 #3
    But isn't the sign supposed to depend on the orientation of the coordinate system?
  5. May 12, 2012 #4


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    yes, but i think we can safely assume that the y direction mentioned in the question is the usual upward one :smile:
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