Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
smiley41909
Group Title
The Gateway Arch in St. Louis is 640 ft high. How long would it take an object to fall freely from the top?
 2 years ago
 2 years ago
smiley41909 Group Title
The Gateway Arch in St. Louis is 640 ft high. How long would it take an object to fall freely from the top?
 2 years ago
 2 years ago

This Question is Open

Thatsmeh Group TitleBest ResponseYou've already chosen the best response.0
Do we know anything about the object like weight?
 2 years ago

HairtUB Group TitleBest ResponseYou've already chosen the best response.0
we don't need
 2 years ago

HairtUB Group TitleBest 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
 2 years ago

smiley41909 Group TitleBest 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.
 2 years ago

HairtUB Group TitleBest ResponseYou've already chosen the best response.0
what is the function? st 16t2?
 2 years ago

smiley41909 Group TitleBest ResponseYou've already chosen the best response.0
s(t)=16t^2
 2 years ago

HairtUB Group TitleBest 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
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.