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42. We solve the problem using the workkinetic energy theorem which states that the
change in kinetic energy is equal to the work done by the applied force,
KW
Δ=
. In our
problem, the work done is
WF
d
=
, where
F
is the tension in the cord and
d
is the length
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 Spring '08
 Any
 Physics, Energy, Force, Kinetic Energy, Work

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