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18. (-/5 Points) DETAILS SERPSE 10 10.8.OP.026. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The device shown in the figure below consists of a thin rod of length ( = 22.3 cm and mass m = 1.20 kg with a solid sphere of diameter d = 10.0 cm and mass M = 2.00 kg attached to its top. The device is free to pivot about a frictionless axle through the bottom of the rod. The device is initially vertical and at rest when it starts to rotate clockwise. M IN (a) After the combination rotates through 90 degrees, what is its rotational kinetic energy (in ? (b) What is the angular speed (in rad/s) of the rod and sphere? rad/s (c) What is the linear speed (in m/s) of the center of mass of the sphere? m/s (d) How does it compare with the speed had the sphere fallen freely through the same distance of 27.3 cm? (Express your answer as a percentage of Vail) is ---Select-- Vallby %. swing Need Help? Read