20 Which among the following is the fundamental equation of S.H.M.? a.x+(k/m) x 0 b.xw'x 0 C.x+ (k m)x0 d. x+ w=0

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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21. Consider the steady-state absolute amplitude equation shown below, if w/
a.x+ (k m) x -0
b. x wx o
C.x+ (k/ m)x 0
d. x+ w =0
Wn = 2 then amplitude ratio (X/Y) =?
(XY) = v{1 +[2E (ww°} / v{[1 – (ualum) + (25 (w/wn)"}
a. 0
b. 1
c. less than 1
d. greater than 1
22. Magnification factor is the ratio of
a. zero frequency deflection and amplitude of steady state vibrations
b. amplitude of steady state vibrations and zero frequency deflection
c. amplitude of unsteady state vibrations and zero frequency distribution
d. none of the above
23. Calculate critical speed of a vehicle which moves on a road having
sinusoidal profile of wavelength 2.5 m. The mass of the vehicle is 300 kg
and natural frequency of its spring suspension system is 8 rad/sec
a. 4.15-m/sec
b. 3.18 m/sec
c. 2.36 m/sec
d. None of the above
24. Calculate damped natural frequency, if a spring mass damper system is
subjected to periodic disturbing force of 30 N. Damping coefficient is equal
to 0.76 times of critical damping coefficient and undamped natural
frequency is 5 radisec
a. 3.99 rad/sec
b. 2 13 rad/sec
INIVERSITY
Transcribed Image Text:21. Consider the steady-state absolute amplitude equation shown below, if w/ a.x+ (k m) x -0 b. x wx o C.x+ (k/ m)x 0 d. x+ w =0 Wn = 2 then amplitude ratio (X/Y) =? (XY) = v{1 +[2E (ww°} / v{[1 – (ualum) + (25 (w/wn)"} a. 0 b. 1 c. less than 1 d. greater than 1 22. Magnification factor is the ratio of a. zero frequency deflection and amplitude of steady state vibrations b. amplitude of steady state vibrations and zero frequency deflection c. amplitude of unsteady state vibrations and zero frequency distribution d. none of the above 23. Calculate critical speed of a vehicle which moves on a road having sinusoidal profile of wavelength 2.5 m. The mass of the vehicle is 300 kg and natural frequency of its spring suspension system is 8 rad/sec a. 4.15-m/sec b. 3.18 m/sec c. 2.36 m/sec d. None of the above 24. Calculate damped natural frequency, if a spring mass damper system is subjected to periodic disturbing force of 30 N. Damping coefficient is equal to 0.76 times of critical damping coefficient and undamped natural frequency is 5 radisec a. 3.99 rad/sec b. 2 13 rad/sec INIVERSITY
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