Angular Speed: Man Moves 2m from Turntable Center

[squintyeyes]

A large turntable rotates about a fixed vertical axis, making one revolution every 5.00 s. The moment of inertia of the turntable about its axis is 1.10e+03 kgm2. A man of mass 85.0 kg initially standing at the center of the turntable runs out along a radius. What is the angular speed of the turntable when the man is 2.00 m from the center? (As usual, assume that the man can be treated as a particle.)
________ rad/s

For this problem what equations should i use?

 

[rock.freak667]

For this problem what equations should i use?

Well the system is rotating and then a man stands on the disc...so what quantity is conserved?

 

[squintyeyes]

is angular momentum conserved and if so how would that apply

 

[rock.freak667]

is angular momentum conserved and if so how would that apply

Well the system is rotating without the man, so what is the initial angular momentum?

When the man is on the disc, what is the new total moment of inertia?