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Math Help - velocity and acceleration

  1. #1
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    velocity and acceleration

    Given that the acceleration vector is ,
    the initial velocity is ,
    and the initial position vector is , compute:
    v(t) and r(t)
    So far, i have v(t) = <sin(-t)+1, -cos(-t), 2t^2+1>
    r(t) = <cos(-t)+t+1, t, (2/3)t^3+t+1>

    But it's wrong, i still dun know what's wrong.
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  2. #2
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    Quote Originally Posted by zpwnchen View Post
    So far, i have v(t) = <sin(-t)+1, -cos(-t), 2t^2+1>
    r(t) = <cos(-t)+t+1, t, (2/3)t^3+t+1>

    But it's wrong, i still dun know what's wrong.
    The j-component of v(t) is wrong (as is easily seen by substituting t = 0).
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  3. #3
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    velocity and acceleration

    gotcha! thanks.
    Last edited by mr fantastic; October 10th 2009 at 11:14 PM. Reason: Question moved to new thread.
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