angular momentum must remain constant. This star is in the process of collapsing so that its radius becomes smaller but its mass remains the same. As a result of this contraction, at some point, the rotational inertia of the star become 1/3 of what is was initially. What has happened to star's rotational kinetic energy during this contraction? To answer this question, calculate a numerical value for the ratio of the star's kinetic energy after the contraction to its kinetic energy before the contraction.
Fig: 1
Fig: 2
Fig: 3