1
GATE ME 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
The damping ratio for a viscously damped spring mass system, governed by the relationship $$\,m{{{d^2}x} \over {d{t^2}}} + c{{dx} \over {dt}} + kx = f\left( t \right),\,\,\,$$ is given by
A
$$\sqrt {{c \over {mk}}} $$
B
$${c \over {2\sqrt {km} }}$$
C
$${c \over {\sqrt {km} }}$$
D
$$\sqrt {{c \over {2mk}}} $$
2
GATE ME 2016 Set 3
Numerical
+1
-0
The static deflection of a spring under gravity, when a mass of 1 kg is suspended from it, is 1 mm. Assume the acceleration due to gravity g =10 m/s2 . The natural frequency of this spring-mass system (in rad/s) is _____________
Your input ____
3
GATE ME 2016 Set 1
Numerical
+1
-0
A single degree of freedom spring mass system with viscous damping has a spring constant of 10 kN/m. The system is excited by a sinusoidal force of amplitude 100 N. If the damping factor (ratio) is 0.25, the amplitude of steady state oscillation at resonance is ________mm.
Your input ____
4
GATE ME 2015 Set 3
MCQ (Single Correct Answer)
+1
-0.3
Which of the following statements are TRUE for damped vibrations?

$$P.$$ For a system having critical damping, the value of damping ratio is unity and system does not undergo a vibratory motion.
$$Q.$$ Logarithmic decrement method is used to determine the amount of damping in a physical system.
$$R.$$ In case of damping due to dry friction between moving surfaces resisting force of constant magnitude acts opposite to the relative motion.
$$S.$$ For the case of viscous damping, drag force is directly proportional to the square of relative velocity.

A
$$P$$ and $$Q$$ only
B
$$P$$ and $$S$$ only
C
$$P,Q$$ and $$R$$ only
D
$$Q$$ and $$S$$ only
GATE ME Subjects
Turbo Machinery
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12