
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Transcribed Image Text:A O 35%1 4:34 pm
A block-spring system has a maximum
restoring force Fmax = 0.1 N. If the
amplitude of the motion is A = 0.01 m and
the mass of the block is m = 400 g then the
angular frequency w is equal to
1.25 rad/s
20 rad/s
10 rad/s
5 rad/s
2.5 rad/s
The wavefunction of a mechanical wave on
a string is described by: y(x,t) =
0.012cos(TTx-100rt+21t/3), where x and y
are in meters and t is in seconds. The
transverse velocity of an element on the
string at the left end (x = 0), at time t = 0 is:
-0.6V3n m/s
None of the listed
-0.6n m/s
+0.6r m/s
+0.6v3n m/s

Transcribed Image Text:3 ll 35% à 4:34 pm
A block attached to a spring, oscillates on a
frictionless horizontal surface with a period
of 0.3 s. The time needed by the block to
move (for the first time) from position x = A
to x = -A/2 is:
0.15 sec
0.2 sec
0.05 sec
0.3 sec
0.1 sec
A musical note on a piano has a frequency
of 31 Hz. If the tension in the 2-m string is
308 N, and one-half wavelength occupies
the string, what is the mass of the wire?
0.024 kg
0.019 kg
0.047 kg
0.031 kg
0.040 kg
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- 4G VOWIF O 450 J A block-spring system has a maximum restoring force Fmax = 0.1 N. If the amplitude of the motion is A = 0.01 m and the mass of the block is m = 100 g then the angular frequency w is equal to 20 rad/s O 5 rad/s O 1.25 rad/s O 10 rad/s O 2.5 rad/sarrow_forwardFind the system's natural frequency shown in the figure with references to x. The block moves downward and the disk has radius r and moment inertia (J.) rotates about the fixed point. Assume the cable is rigid with negligible mass. 24 ww Keg 23kme zmarrow_forwardConsider a spring-mass system with mass equal to 1 kg, spring constant equal to 25 Newton/meter.Which damping constant b causes critical damping?If the damping constant b in the above system is set to 3 N ∙ sec/m, then what can be said about the number of timesdoes the object pass through its equilibrium position?If the damping constant b in the above system is set to 8 N ∙ sec/m, then what is the interval of time between thesecond time the object returns to its equilibrium position and the third time it returns to its equilibrium position?arrow_forward
- answer ASAP would be appreciatedarrow_forward1- Two mass-spring-damper systems A & B. System A has = 0.1 and @n = 20 rad/sec, and system B has < = 0.3 and wn = 5 rad/sec. Which system will vibrate longer in time? Why?arrow_forwardA SDOF system with a mass 25 kg and stiffness 10 N/mm with damping 0.15 Ns/m is initially at rest. IF the inital velocity is 100 mm/sec. find the expression for subsequent displacement .Hence find displacement and velocity at t=2 secsarrow_forward
- Find the natural frequency in Hertz of an undamped mass-spring system with a m= 100 grams and k= 100 N/marrow_forwardObtain X1(s)/F(s) and then determine the damping coefficient C of the mechanical system below. m2 =160.1 kg, k =953.7 N/m, k, =1,451.7 N/m, b, =148.0 N-s/m. X1(t) x2(t) k2 f2(t) m2 k, b2 massless plate Sonrakiarrow_forwardQ1: Find the system's natural frequency shown in the figure with references to x. The block moves downward and the disk has radius r and moment inertia (Jo) rotates about the fixed point. Assume the cable is rigid with negligible mass. 2k ☑N E Earrow_forward
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