physics

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A student holds two lead weights, each of mass
12 kg. When the students’ arms are extended
horizontally, the lead weights are 0.82 m from
the axis of rotation and the student rotates
with an angular speed of 1.5 rad/sec. The
moment of inertia of student plus stool is
5.5 kg m2
and is assumed to be constant; i.e.,
the student’s arms are massless! Then the
student pulls the lead weights horizontally to
a radius 0.16 m from the axis of rotation.
Calculate the final angular speed of the
system.
Answer in units of rad/s

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