# ap physics

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On a frozen pond, a 7 kg sled is given a kick
that imparts to it an initial speed of 3.1 m/s.
The coefficient of kinetic friction between sled
and ice is 0.15.
The acceleration of gravity is 9.8 m/s2 .
Find the distance the sled moves before
coming to rest.
Answer in units of m.

• ap physics -

Ke = (1/2) m v^2 = m (4.8) Joules

F = .15 m g = m ( 1.47) Newtons

F d = Ke
d = m (4.8)/[ m(1.47)]
d = 4.8/1.47

• ap physics -

3.2687 meters

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