Questions 1,2,3

Chapter 8 Test - Form A - Part 1 Choose the correct ranking for the moment of inertia of each of the following objects about their centers. two spheres. All of the objects have the same mass. The cube has a side length of 2R, where R is the radius of the Hollow Cube Solid Sphere Hollow Sphere 2R 2R 2R A. Icube > Isolid sphere > Ihollow sphere B. Isolid sph > Icube > Ihollow sphere C. Ihollow sphere > Isolid sphere > Icube D. Icube > Ihollow sphere > Isolid sphere E. Isolid sphere > Ihollow sphere > Icube 2. The lug nuts on a car wheel require tightening to a torque of 90 N . m. If a 30-cm long wrench is used, what is the magnitude of the minimum force required using the wrench? A. 300 N B. 2700 N C. 30 N goN D. 150 N E. 15 N 3. A figure skater of moment of inertia 80 kg . m is spinning with rotational velocity 4 rad/s. Find the rotational kinetic energy of the figure skater. A. 320 J B. 1280 J Go ky . r C. 20J D. 5J E. 640 J