A massless rod S having length $2l$ has equal point masses attached to its two ends as shown in figure. The rod is rotating about an axis passing through its centre and making angle $ heta$ with the

Question

A massless rod S having length $2l$ has equal point masses attached to its two ends as shown in figure. The rod is rotating about an axis passing through its centre and making angle $\theta$ with the axis. The magnitude of change of angular momentum of rod i.e. $\left|\frac{d\vec{L}}{dt}\right|$ equals

A

$2 m l^2 \omega^2 \sin\theta \cdot \cos\theta$

B

$m l^2 \omega^2 \sin 2\theta$

C

$m l^2 \sin 2\theta$

D

$m^{1/2} l^{1/2} \omega \sin\theta \cdot \cos\theta$

Accepted Answer

$m l^2 \omega^2 \sin 2	heta$

Answer

$2 m l^2 \omega^2 \sin	heta \cdot \cos	heta$

Answer

$m l^2 \sin 2	heta$

Answer

$m^{1/2} l^{1/2} \omega \sin	heta \cdot \cos	heta$

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