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NEET 2007 (AIPMT) · Angular Momentum & its Conservation

Angular Momentum & its Conservation question from NEET 2007 (AIPMT)

Q88NEET 2007 · AIPMTEasy

Angular Momentum & its Conservation

A particle of mass m moves in the XY plane with a velocity v along the straight line AB. If the angular momentum of the particle with respect to origin O is LA when it is at A and LB when it is at B, then

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Answer: (a)

$L = mv \times$ (perpendicular distance OC of line AB from O).
A and B lie on the same line, so the perpendicular distance and $mv$ are the same.
So $L_A = L_B$ : answer (a).

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