Normal Modes

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Normal Modes kuvakaappaus  Lataa  Upota
  • Värähtelijä
  • Normal Modes
  • Polarisaatio

Sisältö

  • Värähtelijä
  • Normal Modes
  • Polarisaatio
  • Mass Spring System
  • Taajuus
  • Amplitudi
  • Phase

Description

Play with a 1D or 2D system of coupled mass-spring oscillators. Vary the number of masses, set the initial conditions, and watch the system evolve. See the spectrum of normal modes for arbitrary motion. See longitudinal or transverse modes in the 1D system.

Esimerkkejä oppimistavoitteista

  • Explain what a normal mode is.
  • Explain what are the frequency, the amplitude, and the phase of a normal mode.
  • Explain why different normal modes have different frequencies and why higher-numbered modes have higher frequencies.
  • Identify how many normal modes a given system has and be able to sketch the individual modes qualitatively, for both 1D and 2D systems.
  • Explain the distinction between transverse and longitudinal normal modes in a 1D system.
  • Explain how adjusting the phase of a normal mode affects the motion of the system.
  • Explain qualitatively how any arbitrary state of the system can be written as a sum of normal modes; that is, explain the superposition principle.
  • Explain which properties of the system are set by the initial conditions, which properties are time-independent, and which properties are time-dependent.
  • Explain why striking a metal plate in one spot raises the temperature of the plate.
Version 1.01

Teacher Tips

Opettajan opas (pdf) sisältää PhET-tiimin vinkkejä. ( PDF ).

Teacher-Submitted Activities

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Kieli Download or Run Tips
Baski All Euskara Download Run now Bibrazio-modu normalak
Bosnia All Bosanski Download Run now Normalni modovi
Brasilian portugali All português (Brasil) Download Run now Modos Normais
Espanja All español Download Run now Frecuencias resonantes.
Espanja (Meksiko) All español (México) Download Run now Frecuencias resonantes.
Espanja (Peru) All español (Perú) Download Run now Frecuencias Resonantes
Galego All Gallegan Download Run now Modos de vibración
Heprea All עברית Download Run now מצבים נורמלים
Indonesia All Bahasa Indonesia Download Run now Pola - pola Normal
Italia All italiano Download Run now Modi normali di vibrazione (Risonanza)
Japani All 日本語 Download Run now 基準振動(モード)
Kannada All Kannada Download Run now ಲಂಭ ಬಹುವರ್ತಿ(ಮೋಡ್)
Kazakki All Kazakh Download Run now қалыпты тізімдер
Kiina - perinteinen All 中文 (台灣) Download Run now Normal Modes 正規振態
Kiina - yksinkertaistettu All 中文 (中国) Download Run now 标准振荡
Korea All 한국어 Download Run now 정규 모드
Kreikka All Ελληνικά Download Run now Κανονικές καταστάσεις
Makedonia All македонски Download Run now Нормални модови
Mongoli All Монгол (Монгол) Download Run now Хэвийн Горим
Persia All فارسی Download Run now مد طبيعي
Puola All polski Download Run now Mody Normalne
Ranska All français Download Run now Modes vibratoires à plusieurs corps
Saksa All Deutsch Download Run now Normalschwingungen 1D & 2D
Serbia All Српски Download Run now Нормални модови
Slovakki All Slovenčina Download Run now Normálne vibračné módy
Tanska All Dansk Download Run now Normalindstillinger
Thai All ไทย Download Run now โหมดปกติ
Turkmeeni All Turkmen Download Run now Yrgyldamanyň normal diapazonlary
Unkari All magyar Download Run now Normál módusok
Valkovenäjä All беларускі Download Run now Нармальныя рэжымы
Vietnam All Tiếng Việt Download Run now Kiểu dao động chuẩn tắc

Windows Macintosh Linux
Microsoft Windows
XP/Vista/7/8.1/10
Macromedia Flash 9 or later
OS X 10.9.5 or later
Macromedia Flash 9 or later
Macromedia Flash 9 or later

Suunnitteluryhmä Kolmannen osapuolen kirjastot Kiitokset
  • Michael Dubson (lead designer/developer)
  • Jon Olson (developer)
  • Ariel Paul (development/interviews)
  • Trish Loeblein (development)