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Anonymous

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#590829 ·published 2007-06-26 20:12 UTC
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Un cuerpo de 2400g esta sujeto a una cuerda a 10m de altura.
Determine la aceleracion del cuerpo al cortar la cuerda.

Epg = m.g.h = 2400x9.8x10 = 235200 j

Ec = (m.v^2)/2
v = raiz[(2.Ec)/m] = raiz[(2x235200)/2400] = 14 m/s

v = dX/dT
dT = dX/v = 100/14 = 0.7s

a = dV/dT = (14-0)/(0.7-0) = 20m/s^2

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| a = 20m/s^2 |