- #1
CannonSLX
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Homework Statement
Object falls from a tree which is 3m above the ground, what is its velocity when it hits the ground ?
Homework Equations
mgΔh=1/2mv2
or
s=vt-1/2at2
The Attempt at a Solution
Using the idea of PE=KE, as the masses cancel out I get an answer of V=7.66ms-1
However I thought that this question can also be done with a suvat equation, I use the same condition which is used for KE [That U=0].
When attempting with suvat I get an answer of 17.15ms-1 why is that ?