試題詳解

5. Two point masses 1 kg and 2 kg are on a massless bar with axis of rotation through the center of length 2 meters, and a sphere of radius 10 cm and of mass 100 kg is on the center of the bar, as shown below. What is the moment of inertia (kg∙m2 )?
(A) 3.33
(B) 3.4
(C) 3.5
(D) 3.67
(E) 4