A body of mass 2 kg is moving with a constant acceleration of $(2\hat{i} + 3\hat{j} - \hat{k})ms^{-2}$ If the displacement made by the body is $(3\hat{i} - \hat{j} + 2\hat{k})$ m then the work done is
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Work = $m(\vec{a} \cdot \vec{S})$. Calculate the dot product of acceleration and displacement first, then multiply by mass.