Answer Happy

x Your answer is incorrect. Final state Initial state A hollow lightweight grooved disk whose moment of inertia is 3.5 x 103 kg-m² rotates with negligible friction around a vertical axis. Free to slide with negligible friction in the groove are two metal blocks, each with a mass of 0.080 kg, and they are connected to each other by a spring. At a particular moment in time (the "initial state") the blocks are 0.42 m apart, with zero radial velocity (that is, they are not moving toward or away from each other). At this moment the angular speed of the disk is on, is 19 radians/s. The spring pulls the blocks toward each other, and at a later time (the "final state") the blocks are 0.14 m apart. Now what is the angular speed oy? Approximate the metal blocks as point particles. 81.27 radians/s