A student holds two lead weights, each of mass 7.4 kg. When the students’ arms are extended
horizontally, the lead weights are 1.1 m from
the axis of rotation and the student rotates
with an angular speed of 2.1 rad/sec. The
moment of inertia of student plus stool is
6.9 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 0.19 m from the axis of rotation. Calculate the final angular speed of the
system.
Answer in units of rad/s.