162 CHAPTER 6 • Circular Motion and Other Applications of Newton’s Laws n T mg (a) Inertial observer n T mg (b) Noninertial observer Ffictitious Figure 6.14 (Example 6.9) A block of mass m connected to a string tied to the center of a rotating turntable. (a) The inertial observer claims that the force causing the circular motion is provided by the force T exerted by the string on the block. (b) The noninertial observer claims that the block is not accelerating, and therefore she introduces a

162 CHAPTER 6 • Circular Motion and Other Applications of Newton’s Laws n T mg (a) Inertial observer n T mg (b) Noninertial observer Ffictitious Figure 6.14 (Example 6.9) A block of mass m connected to a string tied to the center of a rotating turntable. (a) The inertial observer claims that the force causing the circular motion is provided by the force T exerted by the string on the block. (b) The noninertial observer claims that the block is not accelerating, and therefore she introduces a