Waveguide ``Equivalent Circuits'' for the Uniformly Moving Rigid String Termination

a) Velocity waves.
b) Force waves.

• String moves with speed $v_0$ or 0 only
• String is always one or two straight segments
• A ``Helmholtz corner'' (slope discontinuity) shuttles back and forth at speed $c$
• String slope increases without bound
• Applied force at termination steps up to infinity