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2014-07-23T00:01:36-03:00
P = 250w
F =200 N
d = 10m

P= \frac{T}{t} >> t =  \frac{T}{P} = \frac{F.d}{P}

t =\frac{F.d}{P} =  \frac{200.10}{250}

t = 8 s
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