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loco85

  • 3 years ago

The displacement (in meters) of a particle moving in a straight line is given by the equation of motion below, where t is measured in seconds. http://www.webassign.net/cgi-bin/symimage.cgi?expr=s%20%3D%207%2Ft%5E2 (a) Find the velocity of the particle at time t = a. m/s (b) Find the velocity of the particle at time t = 1. m/s (c) Find the velocity of the particle at time t = 2. m/s (d) Find the velocity of the particle at time t = 3. m/s

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  1. bendt
    • 3 years ago
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    Differentiate and put your values of t in.

  2. dhatraditya
    • 3 years ago
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    velocity is ds/dt so differentiate your equation, then plug in values for t

  3. alice_smith
    • 3 years ago
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    the answer is d

  4. loco85
    • 3 years ago
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    It's not multiple choice.

  5. dhatraditya
    • 3 years ago
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    huh? this is not a multiple choice question

  6. alice_smith
    • 3 years ago
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    oh

  7. bendt
    • 3 years ago
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    Have you got it loco?

  8. loco85
    • 3 years ago
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    I'm having trouble figuring out how to do it.

  9. alice_smith
    • 3 years ago
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    u get better i tryed

  10. bendt
    • 3 years ago
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    \[v=\frac{ds}{dt}=\frac{d(7t^{-2})}{dt}=-14t^{-3}\]That's your function for velocity, now just plug in the values of t.

  11. loco85
    • 3 years ago
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    What would the value for a be then?

  12. bendt
    • 3 years ago
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    -14/a^3

  13. loco85
    • 3 years ago
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    The way you showed is really helpful.

  14. bendt
    • 3 years ago
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    Good, glad I helped.

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