anonymous
  • anonymous
The Gateway Arch in St. Louis is 640 ft high. How long would it take an object to fall freely from the top?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Do we know anything about the object like weight?
anonymous
  • anonymous
we don't need
anonymous
  • anonymous
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

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anonymous
  • anonymous
The function st  16t2 is used to approximate the distance s, in feet, that an object falls freely from rest in t seconds.
anonymous
  • anonymous
what is the function? st 16t2?
anonymous
  • anonymous
s(t)=16t^2
anonymous
  • anonymous
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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