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Matt71 Group Title

The height, "h" m, of a golf ball at time, "t" s, from the ground is given h=-5t^2+15t. a.) Find the time of flight of the golf ball. **solutions will be appreciated

  • 2 years ago
  • 2 years ago

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  1. apoorvk Group Title
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    find the two times when height "h" is zero. equate the equation to zero for that. now the smaller 't' will be the time when the ball was launched and the larger 't' value wil be the time when the ball landed. deduct the two to get the Time Period.

    • 2 years ago
  2. Recursing Group Title
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    The ball ends it's flight when it height reaches 0, right? so \[0=-5t^2+15t\]

    • 2 years ago
  3. amistre64 Group Title
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    i would say there are to many assumptions to be had in order to make a proper determination

    • 2 years ago
  4. Recursing Group Title
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    why?

    • 2 years ago
  5. Matt71 Group Title
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    braaaiiiiiin poop, all I know is it has something to do with a parabola

    • 2 years ago
  6. amistre64 Group Title
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    |dw:1334427906699:dw|

    • 2 years ago
  7. amistre64 Group Title
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    |dw:1334427942407:dw|

    • 2 years ago
  8. amistre64 Group Title
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    mostly terrain issues :)

    • 2 years ago
  9. Matt71 Group Title
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    That's actually just one of the questions. These are all of them: a)Find the time of flight of the golf ball b)Draw the graph of h=-5t^2+15t during the time of flight c)Find the maximum height of the golf ball from the ground d)when is the golf ball 8m above the ground?

    • 2 years ago
  10. Recursing Group Title
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    Yes, but you know the height from the ground, I suppose it's the ground directly beneath the ball.

    • 2 years ago
  11. amistre64 Group Title
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    like a flyball

    • 2 years ago
  12. Matt71 Group Title
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    So, is there anyway to get an exact answer with the information given?

    • 2 years ago
  13. amistre64 Group Title
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    cant make it to the hole if you just hit it straight up

    • 2 years ago
  14. Recursing Group Title
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    It doesn't have to be straight up.

    • 2 years ago
  15. Recursing Group Title
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    You know only the height, you don's know where it is.

    • 2 years ago
  16. amistre64 Group Title
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    a)Find the time of flight of the golf ball h(t) = 0 b)Draw the graph of h=-5t^2+15t during the time of flight draw an upside down parabola using the zeros found above and the vertex found in "c" c)Find the maximum height of the golf ball from the ground the vertex IS the high point d)when is the golf ball 8m above the ground? when h(t) = 8

    • 2 years ago
  17. apoorvk Group Title
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    well ofcourse a lot of assumptions are required, but when nothing's been stated, we take the simplest factors into account, i believe.

    • 2 years ago
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