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Long swing or short swing, which is faster?

I experimented with a swing with a long string and a swing with a short string, which one is faster 💡

The content is a pendulum problem for 5th grade, but if you compare it to a swing, the 1st grade child was also a convincing experiment result ✨The experiment

2025/9/15 Edited to

... Read moreブランコは振り子の一種で、長さによって動く速さや揺れ方が変わることをご存知ですか?私は子どもと一緒に、紐が長いブランコと短いブランコのスピードの違いを実際に試してみました。 実験をすると、短いブランコのほうがスピードが出やすく、怖さを感じやすいことがわかりました。これは、振り子の原理で説明できます。振り子の長さが長いほど、一回の振れ幅は大きくなるものの、スイングの速度は遅くなります。逆に短い振り子は揺れが小さくても速く動くのです。 この感覚を子どもが実際に体験することで、算数で習う振り子の問題が楽しく理解できるようになりました。ブランコの遊びを通じて、身の回りの科学を学ぶ良いきっかけになると思います。 また、実験では「到達点が高いほど空中を飛んでいる感じがして怖い」と子どもが感じたことから、高さと速さの両方が体感に影響することも実感できました。学校の授業だけでなく、家庭での遊びや日常生活の中に科学の原理がたくさん潜んでいることを共有したいです。 ぜひ、親子でブランコの紐の長さを変えて遊びながら振り子の性質を感じてみてください。安全に気をつけて、自然と科学への興味が広がる体験になると思います!

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