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The time dependence of the position of a particle of mass $m = 2$ is given by $\vec{r}(t) = 2t\hat{i} - 3t^2\hat{j}$. Its angular momentum, with respect to the origin, at time $t = 2$ is:
(1) $48(\hat{i} + \hat{j})$
(2) $36\hat{k}$
(3) $-34(\hat{k} - \hat{i})$
(4) $-48\hat{k}$
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