Pendulum
part · 1602 · Early modern era
A weight on a suspension with a constant period of swing (Galileo).
Principles and materials it uses
- Newton’s laws — uses. The swing is described by Newtonian mechanics.
- Universal gravitation — uses. The restoring force is gravity.
- Iron — is made of. The pendulum rod is iron.
- Brass — is made of. The bob is brass.
Where it is used
- Pendulum clock — is part of. The pendulum sets the period.
- Seismograph — is part of. An inertial mass.
- Zhang Heng’s seismoscope — is used in. An internal pendulum (according to reconstructions).
- Tuned mass damper — is used in. A pendulum.
- Rocking horse — is used in. Rocking.
- Metronome — is part of. An inverted pendulum.
- Tower clock — is part of. A pendulum (since the 17th century).
- Zhang Heng’s seismoscope — is part of. An internal pendulum (according to reconstructions).