F=ma 2017 Problem 18

uniform disk is being pulled by a force F through a string attached to its center of mass. Assume that the disk is rolling smoothly without slipping. At a certain instant of time, in which region of the disk (if any) is there a point moving with zero total acceleration?

Answer Choices
A. Region I
B. Region II
C. Region III
D. Region IV
E. All points on the disk have non-zero acceleration.

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