- #1
bbalin23
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Homework Statement
A helicopter flies upward at 3.0m/s. The pilot drops a coke bottle when the helicopter is 30.0m above ground. How long will it take the coke bottle to hit the ground?
(2.8s)
*Note* We can't factor or use quadratics to solve
Homework Equations
The Attempt at a Solution
First I tried to calculate the distance the coke bottle will go upward before falling downward:
Vf2-Vi2/2a = d
9/19.62
0.459
Then I added that to the distance... D(total) = 0.459m + 30.0m = 30.459m
Then I attempted to find the time from there using the formula:
d = vi(t) + 1/2 a t(squared)
Vi from the maximum height (Total distance) is zero so
Sqrt(2d/a) = t
Sqrt(60.918/9.81)
Sqrt(6.20978)
t = 2.4919
= 2.5s
Im off by .3 please help!
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