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

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ThatsmehBest ResponseYou've already chosen the best response.0
Do we know anything about the object like weight?
 one year ago

HairtUBBest ResponseYou've already chosen the best response.0
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
 one year ago

smiley41909Best ResponseYou've already chosen the best response.0
The function st 16t2 is used to approximate the distance s, in feet, that an object falls freely from rest in t seconds.
 one year ago

HairtUBBest ResponseYou've already chosen the best response.0
what is the function? st 16t2?
 one year ago

HairtUBBest ResponseYou've already chosen the best response.0
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
 one year ago
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