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A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown. C is the pivot . O is the circle in which the pendulum moves.and $w_1$ the angular velocity of the bob. If L is the angular momentum about C, then

a) $ \bar {L}$ is constant

b) only direction of $\bar {L} $ is constant

c) only magnitude of $\bar {L}$ is constant

d) none of the above

Can you answer this question?

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$\bar {L}= \bar {r} \times \bar {p}$
$L= lmv$
$\quad = lmrw$
$\quad= ml^2 \sin \theta w$
$\theta $ is constant
answered Nov 28, 2013 by meena.p

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