Question 7.5 An inextensible thread wraps around the axle of a yoyo. The radius of the axle is r and the radius of the yoyo is R. Denote by M the mass of the yolo. The coefficient of static friction between the yoyo and the ground is μ. Suppose that the string is pulled under the tension T an angle from the horizontal. (a) Find an angle 0 such that there is zero net torque acting on the yoyo. (b) Using that angle 0, show that the maximum tension Tmax that can be applied until the yoyo moves is Tmax = μMg cos +μsin R T μ (7.5.1)

Question 7.5 An inextensible thread wraps around the axle of a yoyo. The radius of the axle is r and the radius of the yoyo is R. Denote by M the mass of the yolo. The coefficient of static friction between the yoyo and the ground is μ. Suppose that the string is pulled under the tension T an angle from the horizontal. (a) Find an angle 0 such that there is zero net torque acting on the yoyo. (b) Using that angle 0, show that the maximum tension Tmax that can be applied until the yoyo moves is Tmax = μMg cos +μsin R T μ (7.5.1)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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