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A uniform disk stands upright on its edge, and rests on a
Chapter 11, Problem 85GP(choose chapter or problem)
A uniform disk stands upright on its edge, and rests on a sheet of paper placed on a tabletop. If the paper is pulled horizontally to the right, as in Figure 11–36, (a) does the disk rotate clockwise or counterclockwise about its center? Explain. (b) Does the center of the disk move to the right, move to the left, or stay in the same location? Explain.
Questions & Answers
QUESTION:
A uniform disk stands upright on its edge, and rests on a sheet of paper placed on a tabletop. If the paper is pulled horizontally to the right, as in Figure 11–36, (a) does the disk rotate clockwise or counterclockwise about its center? Explain. (b) Does the center of the disk move to the right, move to the left, or stay in the same location? Explain.
ANSWER:
Solution 85GP
Step 1 of 2
Part a
We are required to determine the direction of rotation of the disk.
If the sheet of paper is pulled to the right, it will exert a torque on the disk. This torque will make the disk to move in a counterclockwise direction about the center.