Which of the following statements are TRUE for damped vibrations? (P) . For a system having critical damping, the value of the 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. * 1 point (A) P and Q only (B) P and S only (C) P, Q and R only (D) Q and S only

Which of the following statements are TRUE for damped vibrations?
(P) . For a system having critical damping, the value of the 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. *
1 point
(A) P and Q only
(B) P and S only
(C) P, Q and R only
(D) Q and S only
by

1 Answer

Answer :

(C) P, Q and R only
by

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