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cowmoo32
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Homework Statement
A rock dropped from a cliff covers one-third of its total distance to the ground in the last second of its fall. Air resistance is negligible. How high is the cliff?
Homework Equations
v = v0 + at2
h = v0t + 0.5at2
v2 = v02 + 2ahh = distance in this case
The Attempt at a Solution
t for [itex]\frac{h}{3}[/itex] = 1 sec
[itex]\frac{h}{3}[/itex] = v0(1) + 0.5(-9.81)(12)
.
.
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h = 3vo + 14.715[itex]\frac{m}{sec^{2}}[/itex]
I've re-arranged the equations but I'm always left with 2 unknowns. I understand this is basic stuff, so just a bump in the right direction will be much appreciated.
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