*22-68. The 200-lb electric motor is fastened to themidpoint of the simply supported beam. It is found thatthe beam deflects 2 in. when the motor is not running. Themotor turns an eccentric flywheel which is equivalent to anunbalanced weight of 1 lb located 5 in. from the axis ofrotation. If the motor is turning at 100 rpm, determine theamplitude of steady-state vibration. The damping factor isc/c, = 0.20. Neglect the mass of the beam.Prob. 22-68

Write the expression for the stiffness of the beam. Write the expression for the natural frequency…

Answered: *22-68. The 200-lb electric motor is…

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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When a mass of 2 kilograms is attached to a spring whose constant is 32 N/m, it reaches rest in the equilibrium position. Starting at t = 0, a force equal to f(t) = 68(e^-2t)cos4t is applied to the system. Determine the equation of motion in the absence of damping.
The 23-kg disk, is pinned at its mass center O and supports the 3-kg block A. The belt which passes over the disk is not allowed to slip at its contacting surface. Determine the natural period of vibration of the system.
While standing in an elevator, the man holds a pendulum which consists of an 18-in. cord and a 0.5-lb bob. If the elevator is descending with an acceleration a = 4 ft/s2, determine the natural period of vibration for small amplitudes of swing.
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