8JQ
10J
32J
160J
Correct answer is C
X = ut + \(\frac{1}{2}\)at2
= (0 x 4) + (\(\frac{1}{2}\) x 0.1 x 4 x 4)
= 0.8m
workdone = force x distance
= 40 x 0.8
= 32J
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