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Verified answer
V^2 = vo^2 + 2as4^2 = 0^2 + 2. v/t . s
16 = 2 . 4/2 . s
16 = 4s
s = 16/4
s = 4 m
W = F.s
W = m . a . s
W = m . v/t . s
W = 2 . 4/2 . 4
W = 16 J
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