Seismograph and conveyor belt: what they have in common

1. Step 1. Seismograph — has part — Pendulum. An inertial mass.
2. Step 2. Pendulum — is used in — Tuned mass damper. A pendulum.
3. Step 3. Tuned mass damper — is part of — Earthquake-resistant building. Dampers.
4. Step 4. Earthquake-resistant building — has part — Base isolation. Base isolation.
5. Step 5. Base isolation — has part — Ball bearing. Friction pendulum bearings.
6. Step 6. Ball bearing — is part of — Conveyor belt. The rollers turn on bearings.

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