Write a note on addition of angular momenta.
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By bringing part of the mass of her body closer to the axis, decrease her body's moment of inertia . Because angular momentum is the product of moment of inertia and angular velocity , if the angular momentum remains constant ( is conserved ), then the angular velocity ( rotational speed ) of the skater must increase.
Derivations from other quantities : L= lw=r×p
It's SI base unit:kg m2 s -1
Dimensions:M L 2 To T -1
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