Dynamics II: Motion in a Plane 8-5 CHAPTER 8 11. A coin of mass m is placed distance r from the center of a turntable. The coefficient of static friction PSS between the coin and the turntable is us. Starting from rest, the turntable is gradually rotated faster and faster. At what angular velocity does the coin slip and "fly off"? a. Begin with a pictorial representation. Draw the turntable both as seen from above and as an edge 8.1 view with the coin on the left side coming toward you. Label radius r, make a table of known information, and indicate what you're trying to find. OnT Tadiuset Mass z m fz els N b. What direction does f point? Explain. c. What condition describes the situation just as the coin starts to slip? Write this condition as a mathematical statement. d. Now draw a free-body diagram of the coin. Following Problem Solving Strategy 8.1, draw the free- body diagram with the circle viewed edge on, the r-axis pointing toward the center of the circle, and the z-axis perpendicular to the plane of the circle. Your free-body diagram should have three forces on it. 1tidOichoni E3 O 2017 Pearson Education. D 13

Dynamics II: Motion in a Plane 8-5 CHAPTER 8 11. A coin of mass m is placed distance r from the center of a turntable. The coefficient of static friction PSS between the coin and the turntable is us. Starting from rest, the turntable is gradually rotated faster and faster. At what angular velocity does the coin slip and "fly off"? a. Begin with a pictorial representation. Draw the turntable both as seen from above and as an edge 8.1 view with the coin on the left side coming toward you. Label radius r, make a table of known information, and indicate what you're trying to find. OnT Tadiuset Mass z m fz els N b. What direction does f point? Explain. c. What condition describes the situation just as the coin starts to slip? Write this condition as a mathematical statement. d. Now draw a free-body diagram of the coin. Following Problem Solving Strategy 8.1, draw the free- body diagram with the circle viewed edge on, the r-axis pointing toward the center of the circle, and the z-axis perpendicular to the plane of the circle. Your free-body diagram should have three forces on it. 1tidOichoni E3 O 2017 Pearson Education. D 13

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: Motion In Two Dimensions

Section: Chapter Questions

Problem 4.35P: Casting molten metal is important in many industrial processes. Centrifugal casting is used for...

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