SOLUTION: The CN Tower in Toronto, at 1815 ft, is the world’s tallest self-supporting tower (no guy wires). How long would it take an object to fall freely from the top?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: The CN Tower in Toronto, at 1815 ft, is the world’s tallest self-supporting tower (no guy wires). How long would it take an object to fall freely from the top?       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 309267: The CN Tower in Toronto, at 1815 ft, is the world’s tallest
self-supporting tower (no guy wires). How long would it
take an object to fall freely from the top?

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
The answer, of course, depends upon where the object stops. In this problem, we'll assume that the object falls to the ground.
Using the formula for the height of a freely-falling object as a function of time:
h%28t%29+=+-%281%2F2%29Gt%5E2%2Bv%5B0%5Dt%2Bh%5B0%5D where: h+=+height, G+=+32ft/sec-sq, v%5B0%5D+=+0 the initial velocity of the object, and h%5B0%5D+=+1815ft., the initial height of the object.
When the object reaches the ground, then h%28t%29+=+0, so..
0+=+-16t%5E2%2B0%2At%2B1815
16t%5E2+=+1815
t%5E2+=+113.4375 and...
highlight%28t+=+10.65%29seconds.