6. What is the moment of inertia I for a uniform ring of radius R and mass M about anaxis (perpendic
問題詳情
6. What is the moment of inertia I for a uniform ring of radius R and mass M about anaxis (perpendicular to the plane of ring) at its rim? (A)0.5 MR2； (B) MR2, (C) 1.5 MR2； (D) 2 MR2； (E) None.