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: Một khối gỗ hình bán trụ tâm C, đồng chất có
khối lượng riêng bán kính R nổi trên mặt chất lỏng, mặt phẳng
của bán trụ hướng lên trên. Khi khối gỗ cân bằng tâm C cách mặt
thoáng chất lỏng khoảng
2
R
và có tiết diện thẳng như hình 2.
a. Tính khối lượng riêng D của chất lỏng.
b. Từ vị trí cân bằng, ấn vào giữa bán trụ xuống theo phương
thẳng đứng một đoạn rất nhỏ rồi thả nhẹ. Hãy xác định chu kỳ dao động nhỏ theo phương thẳng
đứng của bán trụ.
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Answers: 2
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: Một khối gỗ hình bán trụ tâm C, đồng chất có
khối lượng riêng bán kính R nổi trên mặt chất lỏng...
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