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smiley41909

  • 3 years ago

The Gateway Arch in St. Louis is 640 ft high. How long would it take an object to fall freely from the top?

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  1. Thatsmeh
    • 3 years ago
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    Do we know anything about the object like weight?

  2. HairtUB
    • 3 years ago
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    we don't need

  3. HairtUB
    • 3 years ago
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    acceleration of free fall (a) = 9.8m/s² distance (s) 640ft = 195m initial velocity (u) = 0m/s we need time (t) Now use the kinematics equation: s = ut + 1/2at² This is actually a physics question

  4. smiley41909
    • 3 years ago
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    The function st 16t2 is used to approximate the distance s, in feet, that an object falls freely from rest in t seconds.

  5. HairtUB
    • 3 years ago
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    what is the function? st 16t2?

  6. smiley41909
    • 3 years ago
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    s(t)=16t^2

  7. HairtUB
    • 3 years ago
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    Well then, there you have it. I guess that's how it is in ft. Never worked in US units before, so can't say. s = 16t² 640 = 16t² solve for t

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