A disk with moment of inertia I, rotates about a frictionless, vertical axle with angular speed...

 

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A disk with moment of inertia I, rotates about a frictionless, vertical axle with angular speed w. A second disk, this one having moment of inertia I, and initially not rotating, drops onto the first disk (see the figure below). Because of friction between the surfaces, the two eventually reach the same angular speed wp Discuss in your group the following. Before After (a) Calculate w. (Use the following as necessary: I,, I2, and w.) Wf = (b) What fraction of the initial kinetic energy of the two-disk system remains after the disks rotate with the same angular speed? (Use the following as necessary: I, and I,.) (c) Find the value of the answer in part (b) for the following limits. (i) I, - 0 K; (ii) I, = I2 KE K; = (iii) I, → 00 KE K; M b b M G. Nev b A webassign.net/web/Student/Assignment-Responses/tutorial?dep=25544978&tags=autosave#question4268729 5 Ican, Leah Morgan (iii) I, - co KE K; (iv) I, + co K; (d) Explain how each of the results in part (c) makes sense. This answer has not been graded yet. (e) In the general case in which the kinetic energy of the system decreases in the process, where does that energy go? This answer has not been graded yet. (f) What If? In the figure above, what is w, if the second disk is also rotating, but in the clockwise direction, opposite that of disk 1, with an angular speed of w' before the collision? (Use the following as necessary: I,, 1,, w, and worime for w'.) Need Help? Read It 6. [-/3.12 Points] DETAILS SERPSE10 12.3.OP.010.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise 8:07 PM O Search 5/16/2021 126 近 A disk with moment of inertia I, rotates about a frictionless, vertical axle with angular speed w. A second disk, this one having moment of inertia I, and initially not rotating, drops onto the first disk (see the figure below). Because of friction between the surfaces, the two eventually reach the same angular speed wp Discuss in your group the following. Before After (a) Calculate w. (Use the following as necessary: I,, I2, and w.) Wf = (b) What fraction of the initial kinetic energy of the two-disk system remains after the disks rotate with the same angular speed? (Use the following as necessary: I, and I,.) (c) Find the value of the answer in part (b) for the following limits. (i) I, - 0 K; (ii) I, = I2 KE K; = (iii) I, → 00 KE K; M b b M G. Nev b A webassign.net/web/Student/Assignment-Responses/tutorial?dep=25544978&tags=autosave#question4268729 5 Ican, Leah Morgan (iii) I, - co KE K; (iv) I, + co K; (d) Explain how each of the results in part (c) makes sense. This answer has not been graded yet. (e) In the general case in which the kinetic energy of the system decreases in the process, where does that energy go? This answer has not been graded yet. (f) What If? In the figure above, what is w, if the second disk is also rotating, but in the clockwise direction, opposite that of disk 1, with an angular speed of w' before the collision? (Use the following as necessary: I,, 1,, w, and worime for w'.) Need Help? Read It 6. [-/3.12 Points] DETAILS SERPSE10 12.3.OP.010.MI.SA. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise 8:07 PM O Search 5/16/2021 126 近