Pendulums(单摆、复摆及应用英文版).pptVIP

Invention The largest cradle device in the world was designed by MythBusters and consisted of five one-ton concrete and steel rebar-filled buoys suspended from a steel truss.The buoys also had a steel plate inserted in between their two halves to act as a contact point for transferring the energy; this cradle device did not function well. A smaller scale version constructed by them consists of five 6 inches (15?cm) chrome steel ball bearings, each weighing 33 pounds (15?kg), and is nearly as efficient as a desktop model. The cradle device with the largest diameter collision balls on public display, was on display for more than a year in Milwaukee, Wisconsin at retail store American Science and Surplus. Each ball was an inflatable exercise ball 26 inches (66?cm) in diameter (enclosed in cage of steel rings), and was supported from the ceiling using extremely strong magnets. It was dismantled in early August 2010 due to maintenance concerns.[ Foucault Pendulum Introduction The?Foucault pendulum?, or?Foucaults pendulum, named after the French physicist?Léon Foucault, is a simple device conceived as an experiment to demonstrate therotation of the Earth. While it had long been known that the Earth rotates, the introduction of the Foucault pendulum in 1851 was the first simple proof of the rotation in an easy-to-see experiment. Today, Foucault pendulums are popular displays in science museums and universities.[1] Clock Thank you! * * * * * * David Introduction of Our team Doreen Yann Grace PART 01 Introduction history PART 02 Simple pendulum PART 03 Physical pendulum PART 04 Application of pendulum Newton pendulum * * Introduction Properties Period amplitude Composition A?pendulum?is a weight suspended from a?pivot?so that it can swing freely. About history The word pendulum comes from the Latin word pendulus which means hanging. Early Seismometer One of the earliest pendulums was a first century seismometer devised by Chinese scientist Zhang Heng.