Answer:
Let M and R be mass and radius of the hollow cylinder and
the solid sphere. Then
M.I. of hollow cylinder about its axis
of symmetry,
M.I. of solid sphere about an
axis through its centre,
Let and be angular
accelerations produced in the rotational motion of the cylinder and the sphere
on applying a torque t in each case. Then
and
As and so the solid
sphere will acquire a greater angular speed after a given time.
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