figure skater is in a tight spin. She has a moment of inertia of 78.1 kg·m2 and

Question

A figure skater is in a tight spin. She has a moment of inertia of 78.1 kg·m² and an angular momentum of 1500 kg·m²/s. Just before she haults her rotation she thrusts her arms out so that her moment of inertia increases to 88.253 kg·m². What is the skater's angular speed in rev/s just before she stops?

𝜔 =  rev/s

Answer 1

This problem involve conservation of angular momentum.

I₁ω₁ = I₂ω₂

where initial momentum is 1500kgm²/s and I₂=88.253 kgm²