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Math Help - physics question, not advanced.

  1. #1
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    physics question, not advanced.

    hey there, thought i would ask this in this section:

    The Space Shuttle travels at a speed of about 7.70 103 m/s. The blink of an astronaut's eye lasts about 100 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?

    so how many football fields?
    whats a good equation to use also.

    thanks.
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by rcmango View Post
    hey there, thought i would ask this in this section:

    The Space Shuttle travels at a speed of about 7.70 103 m/s. The blink of an astronaut's eye lasts about 100 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?

    so how many football fields?
    whats a good equation to use also.

    thanks.
    Well, it's going to be a d = vt problem, with a unit conversion at the end to convert meters to "football fields." But what is that speed for the shuttle? I would think 7.7 m/s to be far too small for the shuttle.

    -Dan
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  3. #3
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    ya, thats supposed to be 7.70 x 10^3 , thanks alot for the help.

    so i think its: d = (7.7 x 10^3) * 103 m/s

    ..also, if i have to convert to meters at the end, then what is the distance units before the conversion?

    thanks alot.
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  4. #4
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by rcmango View Post
    ya, thats supposed to be 7.70 x 10^3 , thanks alot for the help.

    so i think its: d = (7.7 x 10^3) * 103 m/s

    ..also, if i have to convert to meters at the end, then what is the distance units before the conversion?

    thanks alot.
    Your time is 100 ms. Thus

    d = (7.7 \times 10^3 ~m/s)(100 \times 10^{-3}~s)

    Your units for d are already in meters. You need to convert meters to football fields. (91.4 m = 1 football field.)

    -Dan
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