Posted by Thiago on Thursday, May 24, 2012 at 5:58pm.
KE= W(fr),
KE = m•v²/2,
W(fr) =
m•v²/2 = k•m•g•s .
v = a•t =k•g•t,
mv²/2 =m•( k•g•t)/2.
s = m•v²/2• k•m•g =
=m•( k•g•t)/2• k•m•g =
= g•t²•k/2 =
=9.8•(0.25)² •0.14/2 = 0.043 m/s.
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