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?

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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:
where: , ft/sec-sq, the initial velocity of the object, and ft., the initial height of the object.
When the object reaches the ground, then , so..


and...
seconds.