talking about xylophones
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Everyone else is talking about rules, so let’s shake it up and talk about yo-yos.
Imagine two yo-yos. One has a short string, and the other a long string. They both get dropped at the same time, and begin falling at the same speed. But the one on the short string soon reaches the maximum length and starts coming back up, while the long string one keeps going down. Maybe at the same time that the short one reaches the top and starts to fall again, the long one reaches the bottom and starts to rise. The two fall at the same speed because gravity is the same for both, but they rise and fall at different *frequencies*, with the short one doing it twice as often, because they have different distances to go.
It’s pretty much the same with metal bars. Each little segment of the bar can wiggle a certain amount. Adding these together gives how far up and down each bar can move. A longer bar can therefore move further up and down so takes more time. This means it completes a wobble less often, the sound has a lower frequency or pitch.
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