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6. [-/2 Points] DETAILS MI3 11.2.X.033. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER If an object has a moment of inertia 26 kg.m2 and the magnitude of its rotational angular momentum is 82 kg . m2/s, what is its rotational kinetic energy? Krot = 7. [-/4 Points] DETAILS M13 11.2.X.035. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Mounted on a low-mass rod of length 0.32 m are four balls. Two balls (shown in red on the diagram), each of mass 0.85 kg, are mounted at opposite ends of the rod. Two other balls, each of mass 0.34 kg (shown in blue on the diagram), are each mounted a distance 0.08 m from the center of the rod. The rod rotates on an axle through the center of the rod (indicated by the 'x" in the diagram), perpendicular to the rod, and it takes 1.4 seconds to make one full rotation. (a) What is the moment of inertia of the device about its center? I = kg.m2 (b) What is the angular speed of the rotating device? w = radians/s (c) What is the magnitude of the angular momentum of the rotating device? kg.m2/s 8. [-/3 Points] DETAILS MI4 11.8.054. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A disk of radius R = 9 cm is pulled along a frictionless surface with a force of F = 19 N by a string wrapped around the edge. At the instant when d = 27 cm of string has unwound off the disk, what is the torque exerted about the center of the disk? ic = N . m Additional Materials eBook