MOD.MASTER.W/ETEXT ENG.MECHANICS CARD+BK
MOD.MASTER.W/ETEXT ENG.MECHANICS CARD+BK
15th Edition
ISBN: 9780137519170
Author: HIBBELER
Publisher: PEARSON
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Chapter 22, Problem 70P
To determine

Show that ln(x1/x2)=2π(c/cc)1(c/cc)2 .

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A machine and its foundation weigh is 10x(L) kN. The spring constant and the damping ratio of the soil supporting the foundation may be taken as (L)x10³ kN/m and c = (L)x10² kN-s/m. Forced vibration of the foundation is caused by a force that can be expressed as determine: Q (kN) = (L) sin2nt L=6 Determine: (a) amplitude of motion during machine vibration, (b) maximum dynamic force transmitted to the subgrade during machine vibration. (c) the type of system and its frequency after turning off the machine, and (d) the ratio of two successive amplitudes after turning off the machine.
A mass of 512 g stretches a spring by 8.5 cm. The damping constant is c= 0.37. External vibrations create a force of F(t)= 0.2 sin 31 Newtons, setting the spring in motion tfrom its equilibrium position with zero velocity. What is the real part a of the complex root (a+ iv) af the homogeneous equation? Use g = 9.8 mis. Express your answer in two.decimal places. A Moving to another question will save this response Question 13 of 22
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MOD.MASTER.W/ETEXT ENG.MECHANICS CARD+BK

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