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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The device shown in Figure rotates on the vertical axle as shown. The frame has negligible mass as compared to the four masses each of mass m. Initial angular velocity of the system is ω 0 ​ . Due to an internal mechanism the spokes in the frame lengthen so that the frame lengthen so that the radii of the masses become 2a. Initially, it was a. What will be the new angular velocity of the system?

The device shown in Figure rotates on the vertical axle as shown. The frame has negligible mass as compared to the four masses each of mass m. Initial angular velocity of the system is ω 0 ​ . Due to an internal mechanism the spokes in the frame lengthen so that the frame lengthen so that the radii of the masses become 2a. Initially, it was a. What will be the new angular velocity of the system?

A disk with moment of inertia I1 rotates about a frictionless drops onto the first disk. Because of friction between the surfaces the two eventually reach the same angular speed ω f. Calculate ω f. this one having moment of inertia I2 and initially not rotating vertical axle with angular speed ω i. A second disk