INFO:
ふりこが１往復する時間を長くするには「おもりの重さを変える」という予想を確かめよう。重さのちがう３つのふりこ。予想通りならどうなる？実験結果から言えることは？

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・This video 「

おもりの重さを変えると１往復する時間は… | NHK for School

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