angular momentum is conserved
intial =final
I *wi=(I *wf+70*r^2 *wf)
where I= 1/2*150
solve for wf
A merry-go-round can be modeled as a disk with radius 2.5 meters and mass of 150 kg. For this problem, assume the density is uniform. It is initially rotating at 2.0 rad/sec. Two children of mass 30 kg and 40 kg hop onto the merry-go-round and stay near the edge. What is the new angular speed?
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