Tham khảo tài liệu 'physics_test_bank_split_11', khoa học tự nhiên, vật lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http 47. Consider four objects each having the same mass and the same radius 1. a solid sphere 2. a hollow sphere 3. a flat disk in the x y plane 1. 2. 3. 4. a hoop in the x y plane The order of increasing rotational inertia about an axis through the center of mass and parallel to the z axis is A. 1 2 3 4 B. 4 3 2 1 C. 1 3 2 4 D. 4 2 3 1 E. 3 1 2 4 ans C 48. A and B are two solid cylinders made of aluminum. Their dimensions are shown. The ratio of the rotational inertia of B to that of A about the common axis X-X is R X- B 2R _1_ _ X A. B. C. D. E. 2 4 8 16 32 L ans E 49. Two uniform circular disks having the same mass and the same thickness are made from different materials. The disk with the smaller rotational inertia is A. the one made from the more dense material B. the one made from the less dense material C. neither both rotational inertias are the same D. the disk with the larger angular velocity E. the disk with the larger torque ans A Chapter 10 ROTATION 151 Simpo PDF Merge and Split Unregistered Version - http 50. A uniform solid cylinder made of lead has the same mass and the same length as a uniform solid cylinder made of wood. The rotational inertia of the lead cylinder compared to the wooden one is A. greater B. less C. same D. unknown unless the radii are given E. unknown unless both the masses and the radii are given ans B 51. To increase the rotational inertia of a solid disk about its axis without changing its mass A. drill holes near the rim and put the material near the axis B. drill holes near the axis and put the material near the rim C. drill holes at points on a circle near the rim and put the material at points between the holes D. drill holes at points on a circle near the axis and put the material at points between the holes E. do none of the above the rotational inertia cannot be changed without changing the mass ans B 52. The rotational inertia of a disk
