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In which direction does the damping force acts?

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+1 vote
in Machine Dynamics by (34.3k points)
In which direction does the damping force acts?

(a) Opposite to the motion

(b) Along the motion

(c) Perpendicular to motion

(d) Variable

I have been asked this question in final exam.

I'd like to ask this question from Frequency of Free Damped Vibrations topic in portion Longitudinal and Transverse Vibrations of Machine Dynamics

1 Answer

0 votes
by (38.6k points)
Right answer is (a) Opposite to the motion

The explanation: It is assumed that the frictional resistance to the motion of the body is directly proportional to the speed of, therefore Damping force or frictional force on the mass acts in opposite direction to the motion of the mass.

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