Q 49. 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
Answer: (C)
Explanation:
