Secure | https://session.master.ngp itemView?assignmentProblemID=82024141 CH 13

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Secure | https://session.master.ngp itemView?assignmentProblemID=82024141 CH 13 HW Problem 13.26 « previous 4 of 17 next Problem 13.26 Part A Tuning Forks in Neurology Tuning forks are used in the diagnosis of nervous afflictions known as large-fiber polyneuropathies, which are often manifested in the form of reduced sensitivity to vibrations. Disorders that can result in this type of pathology include diabetes and nerve damage from exposure to heavy metals. The tuning fork in the figure(Figure 1) has a frequency of 140 Hz If the tips of the fork move with an amplitude of 1.10 mm, find their maximum speed Umax m/s Submit My Answers Give Up Part B Find their maximum acceleration. Give your answer as a multiple of g | Figure 1 of 1 Zmax 9 Submit My Answers Give Up Continue

Explanation / Answer

w = 2 pi f = 2 x pi x 140 = 879.65 rad/s

A = 1.10 x 10^-3 m

(A) v_max = A w = 0.968 m/s

(B) a_max = A w^2 = 851 m/s^2

a_max = (851/9.81) g

= 86.8 g

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