Aholiday ornament in the shape of a hollow sphere with mass m = 1.50×10−2 kg and radius r = 5.50×10−2 m is hung from a tree limb by a small loop of wire attached to the surface of the sphere. if the ornament is displaced a small distance and released, it swings back and forth as a physical pendulum.
calculate its period. (you can ignore friction at the pivot. the moment of inertia of the sphere about the pivot at the tree limb is 5mr^{2}/3.)
take the free fall acceleration to be 9.80 m/s^2. express your answer using two significant figures.