The average height of an apple tree is 4.00 meters. How long would it take an apple falling from that height to reach the ground?
Given: g = -9.8 meters/second2
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OpenStudy (hannahgrace4464):
.40 seconds i think
OpenStudy (badsheep):
0.90
1.0
1.53
2.3
OpenStudy (badsheep):
@hannahgrace4464
OpenStudy (hannahgrace4464):
.90 im pretty sure
OpenStudy (whpalmer4):
\[h = \frac{1}{2}gt^2\]you know \[h=4.00\]\[g=9.8\]solve for \(t\) and plug in the numbers.
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OpenStudy (badsheep):
is t 4?
OpenStudy (whpalmer4):
\[h = \frac{1}{2}gt^2\]multiply both sides by 2\[2h = gt^2\]divide both sides by \(g\)\[\frac{2h}{g} = t^2\]take square root of both sides\[\sqrt{\frac{2h}{g}} = t = \sqrt{\frac{2*4}{9.8}} = \]
OpenStudy (badsheep):
.90?
OpenStudy (whpalmer4):
does 0.9 * 0.9 * (1/2)*9.8 approximately equal 4.0? If so, then yes.
OpenStudy (badsheep):
yeah thanks guys/girls
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OpenStudy (whpalmer4):
by the way, you'll probably get faster help asking physics problems like this in the physics section rather than the chemistry section