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Math Help - Falling Object

  1. #1
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    Falling Object

    The height h (in feet) of an object that is dropped from the height of s feet is given by the formula h = s - 16t 2 , where t is the time the object has been falling. A 6 foot tall woman on a sidewalk looks directly overhead and sees a window washer drop a bottle from the 4 story. How long does she have to get out of the way? Round to the nearest tenth. (A story is 12 feet.)

    MY SET UP:

    s = 48

    h = 0

    Is that right?

    Then:

    0 = 48 - 16t^2

    Is this the correct equation?
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  2. #2
    Like a stone-audioslave ADARSH's Avatar
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    Hello
    Quote Originally Posted by magentarita View Post
    The height h (in feet) of an object that is dropped from the height of s feet is given by the formula h = s - 16t 2 , where t is the time the object has been falling. A 6 foot tall woman on a sidewalk looks directly overhead and sees a window washer drop a bottle from the 4 story. How long does she have to get out of the way? Round to the nearest tenth. (A story is 12 feet.)

    MY SET UP:

    s = 48

    h = 0

    Is that right?

    Then:

    0 = 48 - 16t^2

    Is this the correct equation?
    You can imagine it this way
    The bottle drops from 4th storey
    Had the woman not moved there would be a
    since the woman is 6feet tall the bottle doesn't need to
    cover this distance hence you need to calculate
    the time taken for covering adistance
    given by
    4 x 12 - 6
    so the eqn becomes
     <br />
6=42-16 t^2 <br />
    and hence the woman wold be safe
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  3. #3
    MHF Contributor
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    your set up..........

    Quote Originally Posted by ADARSH View Post
    Hello

    You can imagine it this way
    The bottle drops from 4th storey
    Had the woman not moved there would be a
    since the woman is 6feet tall the bottle doesn't need to
    cover this distance hence you need to calculate
    the time taken for covering adistance
    given by
    4 x 12 - 6
    so the eqn becomes
     <br />
6=42-16 t^2 <br />
    and hence the woman wold be safe
    Thanks for the set up.
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