Wednesday

April 16, 2014

April 16, 2014

Posted by **Thiago** on Thursday, May 24, 2012 at 5:58pm.

- Physics -
**Elena**, Thursday, May 24, 2012 at 6:23pmKE= 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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