Friction - an example
We are given: vi = 10 m/s; vf = 0 m/s; m = .5
We are looking for s (the distance of slide).
S Energiesinitially = S Energiesfinally .
where Elost = + Ffriction*s = + mFcs .
From S Fy = 0, we have Fc = mg. Therefore:
(1/2)*m*vi2 = (1/2)*m*vf2 + m*m*g*s .