Physics, 16.12.2021 14:00 krojas015

Trên một trụ rỗng khối lượng m = 1 kg, người ta cuộn một sợi dây không giãn có khối lượng và đường kính nhỏ không đáng kể. Đầu tự do của dây được gắn trên một giá cố định (hình vẽ). Để trụ rơi dưới tác dụng của trọng lượng. Gia tốc dài của trụ và sức căng dây treo lần lượt là

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

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