A disk with moment of inertia I1 rotates about a frictionless, vertical axle with angular speed ωi . A second disk, this one having moment of inertia I2 and initially not rotating, drops onto the first disk (Fig. P11.30). Because of friction between the surfaces, the two eventually reach the same angular speed ωf. (a) Calculate ωf. (b) Calculate the ratio of the final to the initial rotational energy

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Q: A solid, horizontal cylinder of mass 13.2 kg and radius 1.00 m rotates with an angular speed of 8.00…

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.