A mass of 1 kg is attached to the end of a spring with stiffness 0.9 N – McqOptions

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1.	A mass of 1 kg is attached to the end of a spring with stiffness 0.9 N/mm. The critical damping coefficient of this system is ____.
A.	1.40 Ns/m
B.	2 Ns/m
C.	60 Ns/m
D.	6 Ns/m
Answer» D. 6 Ns/m

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