A kid standing on the edge of a freely spinning merry-go-round moves speedily to the center. Which one of the given statements is essentially true regarding this event and explains why?
i) The angular speed of the system rises as the moment of inertia of the system has reduced.
ii) The angular speed of the system rises as the moment of inertia of the system has risen.
iii) The angular speed of the system reduces as the moment of inertia of the system has risen.
iv) The angular speed of system remains similar since the total torque on the merry-go-round is zero N x m.
v) The angular speed of the system reduces as the moment of inertia of the system has reduced.