SOLUTION: How long will it take an object to hit the ground if it is dropped from a height of 1296 feet? (use d=rt+16r^2) Assume the object initially is held still.

Question 225277: How long will it take an object to hit the ground if it is dropped from a height of 1296 feet? (use d=rt+16r^2) Assume the object initially is held still.
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
d=rt+16t^2
where
d is distance
r is initial velocity
t is time
.
Since it is initially held still, r = 0
d is given as 1296
and we solve for t
.
d=rt+16t^2
1296 = (0)t+16t^2
1296 = 16t^2
1296 = 16t^2
81 = t^2
9 seconds = t

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