Resonance Is when frequency of forced vibration = object's natural frequency. A dramatic increase in amplitude results.
{"Image DocumentName": "ResonanceIs when frequency of forced vibration = object\u2019s natural frequency. A dramatic increase in amplitude results.", "Image ImageDescription": "Eg. Pumping legs when on a swing: pump in rhythm with the swing\u2019s natural freq, and you go higher. Or, get someone to push you at in rhythm with swing - i.e. in resonance Note that if you are pushed really forcefully but not in resonance, you don\u2019t go higher \u2013 timing is more important than force. DEMO: two separated same-frequency tuning forks. Striking one sets the other into vibration! Often called sympathetic vibration. Here\u2019s what\u2019s happening to the second fork: \u2026on return, it meets 1st rarefaction, so moves out with greater amplitude \u2013 effects of natural freq and wave from 1st fork add. Returns at time when another compression arrives \u2013 will move out yet further because already moving. 1st compression pushes fork in a tiny bit\u2026", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}