Conditions for Angular Momentum Conservation
Two ice skaters, with respective masses m₁ and m₂, are at rest on a frictionless horizontal ice surface. After they push off from each other, for which of the following systems is angular momentum not necessarily conserved?
A
Both skaters together about their center of mass
B
Both skaters together about a fixed point on the ice
C
Skater m₁ with respect to a fixed point on the ice
D
Skater m₁ with respect to skater m₂ as origin
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