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GATE Prev Year : Vibrations Test-4
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Question 1
Critical damping is the
Question 2
The number of degrees of freedom of a planar linkage with 8 links and 9 simple revolute joints is
Question 3
A single degree of freedom system has a mass of 2 kg, stiffness 8 N/m and viscous damping ratio 0.02. The dynamic magnification factor at an excitation frequency of 1.5 rad/s is ________
Question 4
A mass m attached to a spring is subjected to a harmonic force as shown in figure. The amplitude of the forced motion is observed to be 50mm. the value of m (in kg) is
Question 5
The damping ratio of a single degree of freedom spring-mass-damper system with mass of 1 kg, stiffness 400 N/m and viscous damping coefficient of 25 N.s/m is ______
Question 6
A mass-spring-dashpot system with mass m = 10 kg, spring constant k = 6250 N/m is excited by a harmonic excitation of 10cos(25t) N. At the steady state, the vibration amplitude of the mass is 40 mm. The damping coefficient (c, in N.s/m) of the dashpot is ______
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