1
GATE ME 2006
+2
-0.6
A vibratory system consists of a mass $$12.5$$ kg, a spring of stiffness $$1000$$ $$N/m,$$ and a dashpot with damping coefficient of $$15$$ $$Ns/m.$$

The value of logarithmic decrement is

A
$$1.35$$
B
$$0.42$$
C
$$0.68$$
D
$$0.66$$
2
GATE ME 2006
+2
-0.6
A vibratory system consists of a mass $$12.5$$ kg, a spring of stiffness $$1000$$ $$N/m,$$ and a dashpot with damping coefficient of $$15$$ $$Ns/m.$$

The value of critical damping of the system is:

A
$$0.223$$ $$Ns/m$$
B
$$17.88$$ $$Ns/m$$
C
$$71.4$$ $$Ns/m$$
D
$$223.6$$ $$Ns/m$$
3
GATE ME 2005
+2
-0.6
In a spring-mass system, the mass is 0.1 kg and the stiffness of the spring is 1 kN/m. By introducing a damper, the frequency of oscillation is found to be 90% of the original value. What is the damping coefficient of the damper?
A
1.2 N.s/m
B
3.4 N.s/m
C
8.7 N.s/m
D
12.0 N.s/m
4
GATE ME 2004
+2
-0.6
A uniform stiff rod of length $$300$$ $$mm$$ and having a weight of $$300$$ $$N$$ is pivoted at one end and connected to a spring at the other end. For keeping the rod vertical in a stable position the minimum value of spring constant $$K$$ needed is A
$$300$$ $$N/m$$
B
$$400$$ $$N/m$$
C
$$500$$ $$N/m$$
D
$$1000$$ $$N/m$$
GATE ME Subjects
Engineering Mechanics
Strength of Materials
Theory of Machines
Engineering Mathematics
Machine Design
Fluid Mechanics
Turbo Machinery
Heat Transfer
Thermodynamics
Production Engineering
Industrial Engineering
General Aptitude
EXAM MAP
Joint Entrance Examination