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spndsh

  • 3 years ago

d/dt (a(t-sint)i-hat + a(1-cost)j-hat)

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  1. Ahaanomegas
    • 3 years ago
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    You need to differentiate each component of the original vector to get the components of the differentiated vector.

  2. spndsh
    • 3 years ago
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    |dw:1349560630436:dw| is this right?

  3. Ahaanomegas
    • 3 years ago
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    No. 1. You forgot to multiply by the constant a. 2. The derivative of sin is cos, not -cos. Try again! :)

  4. spndsh
    • 3 years ago
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    a(1+cos t) + sint

  5. spndsh
    • 3 years ago
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    its -sint

  6. Ahaanomegas
    • 3 years ago
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    Nope. Again: 1. You need to write it as a vector. 2. You forgot the a on the y-component (j-hat). Try again! Don't get discouraged. This takes time to fully understand. ;)

  7. Ahaanomegas
    • 3 years ago
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    Try writing it as (at - a sin t, a - a cos t). It makes it easier for me. Try that for yourself!

  8. spndsh
    • 3 years ago
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    |dw:1349561042586:dw| what about this?

  9. Ahaanomegas
    • 3 years ago
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    There you go! Good job. :)

  10. spndsh
    • 3 years ago
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    thanks so much!

  11. Ahaanomegas
    • 3 years ago
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    No problem! Do you see the general method of this so that you can do similar problems in the future?

  12. Ahaanomegas
    • 3 years ago
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    By the way, you're a good learner, @spndsh (!!!)

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