Damped Vibration

Question 1

Vibration is said to be damped when

Answer 1

Frequency gradually reduced until it’s rest to its equilibrium position

Question 2

Sources of Damping

Answer 2

Coulumb Damping
Viscous Damping
Internal Friction

Question 3

Damping due to sliding friction, also called dry friction damping

Answer 3

Coulomb Damping

Question 4

Damping due to the effect of fluid flow inside a small opening in a piston

Answer 4

Viscous Damping

Question 5

Damping due to the internal resistance within the molecule of seemingly elastic body

Answer 5

Internal friction

Question 6

If c is greater than cc

Answer 6

Heavy damping/over damped

Question 7

What is the root in critical damping?

Answer 7

Equal and real root with discriminant of 0

Question 8

What is the root in heavy damping?

Answer 8

Unequal and real root, discriminant greater than 0

Question 9

If c is less than cc,

Answer 9

Light damping / underdamped

Question 10

The root in light damping is

Answer 10

Unequal and complex root, discriminant greater than 0