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Physics, 17.06.2021 16:10 riverviewfarm2133

Trên một trụ rỗng khối lượng m = 1kg người ta cuộn một sợi dây không giãn có khối lượng và đường kính nhỏ không đáng kể. Đầu tự do của cuộn dây được gắn trên một giá cố định. Để trụ rơi dưới tác dụng của trọng lực, lấy g = 10m/s2. Sức căng của dây treo

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Trên một trụ rỗng khối lượng m = 1kg người ta cuộn một sợi dây không giãn có khối lượng và đường kín...
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