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A particle of mass m is doing horizontal...

A particle of mass m is doing horizontal circular motion with the help of a string (conical pendulu) as shown in the figure. If speed of the particle is constant then,

A

the angular momentum of the particle about O is changing

B

magnitude of angular momentum about O remains constant

C

z component of the angular momentum remains conserved

D

z component of torque is always zero.

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The correct Answer is:
A, B, C, D
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