Looking back at part I of this idea, I don't think I did a very good job. Let me summarize the key things I wanted to say: Normally, there are two ways of modeling the motion of an object: Calculating ...

I am going to make a prediction. As people start to get bored with their fidget spinners, they are going to start playing with these double pendulum fidget spinners. The normal spinner has a bearing ...

Keywords: XY-friction pendulum (XY-FP) bearings. Seismic isolation. Truss-bridge models. Numerical analyses. Harmonic simulations. Earthquake simulations. Flat sliding (FS) bearings. Seismic ...