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Math Help - Particle motion

  1. #1
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    Particle motion

    -(t+1)(sint^2/2) is the velocity Intervals [0,3]

    Acceleration at 2?
    When is it farthest to the left? Why?
    When does it change direction? Why?
    What is the total distance traveled from 0 to 3?

    This is on my math test today, nad I was wondering if I got it right..

    I got..

    -1.586
    -2.5066283 because velocity>0
    -2.5066283 because it goes from - to +
    -I got 2.197

    Was I right? Wrong?
    Last edited by elpermic; December 18th 2008 at 04:56 PM.
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  2. #2
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    Quote Originally Posted by elpermic View Post
    -(t+1)(sint^2/2) is the velocity Intervals [0,3]

    Acceleration at 2?
    When is it farthest to the left? Why?
    When does it change direction? Why?
    What is the total distance traveled from 0 to 3?

    This is on my math test today, nad I was wondering if I got it right..

    I got..

    -1.586 Mr F says: +1.586.
    -2.5066283 because velocity>0 Mr F says: t = +2.5066 (because v = 0).
    -2.5066283 because it goes from - to + Mr F says: t = +2.5066.
    -I got 2.197 Mr F says: d = distance travelled left + distance travelled right = 3.2655 + 1.0683 = ....

    Was I right? Wrong?
    No good can ever come from doing a post mortem on a test.
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