QJEEM22Phe7ca: JEE Main 2022 Physics - Class 11 JEEM22Phe7ca Solution: The position vector of 1 kg object is r → = ( 3 i ^ − j ^ ) m…

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QJEEM22Phe7ca: JEE Main 2022 Physics - Class 11 JEEM22Phe7ca Solution: The position vector of 1 kg object is r → = ( 3 i ^ − j ^ ) m…

The position vector of 1 kg object is $\vec{r} = (3 \hat{i} - \hat{j}) m$ and its velocity $\vec{v} = (3 \hat{j} + \hat{k}) m s^{- 1}$ . The magnitude of its angular momentum is $\sqrt{x}$ Nm where x is ___________.

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Accepted Answer

$| \vec{i} | = | \vec{r} \times (m \vec{v}) |$

$= | (3 \hat{i} - \hat{j}) \times (3 \hat{j} + \hat{k}) |$

$= | - \hat{i} - 3 \hat{j} + 9 \hat{k} |$

$= \sqrt{91}$

QJEEM22Phe7ca: JEE Main 2022 Physics - Class 11 JEEM22Phe7ca Solution: The position vector of 1 kg object is r → = ( 3 i ^ − j ^ ) m…

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