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Newton's second law of rotational motion of a system particles having angular momentum $L$ is given by
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Verified Answer
The correct answer is:
$\frac{d L}{d t}=\tau_{\text {ext }}$
The external torque changes the angular momentum, therefore the second law in rotational motion is given by,
$$
\tau_{\mathrm{ext}}=\frac{d L}{d t}
$$
$$
\tau_{\mathrm{ext}}=\frac{d L}{d t}
$$
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