Physics · 2019
JEE Main · 10 April 2019, Shift 2 · Q3
The time dependence of the position of a particle of mass m =2 is given by r ( t )=2 t i -3 t^2 j. Its angular momentum, with respect to the origin,…
The time dependence of the position of a particle of mass $\displaystyle \mathrm{m}=2$ is given by $\displaystyle \vec{r}(\mathrm{t})=2 \mathrm{t} \hat{i}-3 \mathrm{t}^2 \hat{j}$. Its angular momentum, with respect to the origin, at time $\displaystyle \mathrm{t}=2$ is :
Official answer
(2)
$\displaystyle -48 \hat{k}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.