Four hollow spheres, each with a mass of 1 kg and radius R=10 cm, are connected

Question

Four hollow spheres, each with a mass of 1 kg and radius R=10 cm, are connected with massless rods to from a square with sides of length L= 50 cm. In case 1, the masses rotate about an axis that bisects two sides of the square.In case 2, the masses are rotate about an axis that passes through the diagonal of the square.The ratio of the moments of inertia I 1 , I 2 , for the two cases is 1. Now if the spheres were replaced by soild spheres of the same mass and radius, the ratio of the moments of inertia of two cases would:

A. be a zero
B. stay the same
C. decreas
D. increase

Explanation / Answer

B. stay the same

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