 #1
ANAli
 12
 5
 Homework Statement:

(Problem 3.26; Classical Dynamics of Particles and Systems)
Figure 3B illustrates a mass m1 driven by a sinusoidal force whose frequency is w. The mass m1 is attached to a rigid support by a spring of force constant k and slides on a second mass m2. The frictional force between m1 and m2 is represented by the damping parameter b1 and the friction force between m2 and the support is represented by b2. Construct the electrical analog of the system, and calculate the impedance.
 Relevant Equations:
 Inserted image of equations in question. These are from the solution manual.
I am having trouble understanding why the second term in the m2 equation, b1(x'2  x'1), is a negative term. Given that this force is the reason why m2 is moving in the first place, why is it not considered a driving force? I think that I don't have a clear understanding of what driving force means.
Last edited by a moderator: