- #1

shanklove

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## Homework Statement

A neutron star has a radius of 10,000 km, and takes a planet 30 days to complete one revolution around the star. When the star collapses, the new radius is 3 km. Find the new period of revolution of the newly formed neutron star.

## Homework Equations

T=2(pi)/omega

omega = (v cross r)/r^2

## The Attempt at a Solution

Not sure even how to approach this. I'm so confused and i can't find the velocity to find omega! this is my first post on PF, any help please?!