Physics for engineers and scientists When a woman on a friction sleds rotating t

Question

Physics for engineers and scientists
When a woman on a friction sleds rotating turntable extendes her arms out horizontally, her angular momentum is what?
Answer: must remain the same
Why is this, I thought it would increase, because once she extends her arms she has a greater inertia because the mass is farther away from her center. L=I(omega)

Physics for engineers and scientists
When a woman on a friction sleds rotating turntable extendes her arms out horizontally, her angular momentum is what?
Answer: must remain the same
Why is this, I thought it would increase, because once she extends her arms she has a greater inertia because the mass is farther away from her center. L=I(omega)


When a woman on a friction sleds rotating turntable extendes her arms out horizontally, her angular momentum is what?
Answer: must remain the same
Why is this, I thought it would increase, because once she extends her arms she has a greater inertia because the mass is farther away from her center. L=I(omega)

Explanation / Answer

angular momentum is always conserved so it'll remain same

when she'll extens her arm her moment of inertia will increase and to conserve the angular momentum her angular velocity will reduce as

angular momemtum = moment of inertia * angular velocity

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