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A bead can slide on a smooth straight wi...

A bead can slide on a smooth straight wire and a particle of mass `m` attached to the bead by a light string of length `L`. The particle is held in contact with the wire and with the string taut and is then let fall. If the bead has mass `2m` then when the string makes an angle `theta` with the wire, the bead will have slipped a distance.

A

`L ( 1 - "cos" theta)`

B

`(L)/(2) ( 1 - "cos" theta )`

C

`(L)/(3) ( 1 - "cos" theta )`

D

`(L)/(6) ( 1 - "cos" theta )`

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