Jawabanmu

Jawaban paling cerdas!
2014-06-28T20:58:30+07:00
ΣF = m . a
(40-10) = 20 a
3/2 = a

S = vot + 1/2 a. t²
= 0 + 1/2 . 3/2 . 64
= 48 m

:)
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