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Anonymous users2024-02-09Let's do a little experiment, today's task] to explore the scientific principle of cutting the potato paper without breaking it.
Problem analysis] The knife can easily cut the potato, and it can still be cut after wrapping the tissue, which is preliminarily determined to be related to the force and material of the paper. We conducted experiments to further observe and analyze the verification.
Course Objectives: Develop children's ability to discover, analyze, and solve problems.
Materials required for the experiment.
A4 paper. Half a sheet, 1 facial tissue, 1 banana, 1 potato, 1 knife.
I brought an A4 piece of paper, a fruit knife, and a banana and potatoes and took us for an experiment. We first folded the A4 paper in half twice to turn it into a small rectangle, then wrapped the paper around the blade of the fruit knife, and carefully cut the banana and potatoes with the fruit knife wrapped in paper, and the banana and potato were cut in half, and then look at the paper, although it was a little wet, it was intact. We were a little unconvinced, so we tried again, and the result was exactly the same as the one we had just now.
It turned out that the paper and the knife cut into the banana and the potato together, and the knife put pressure on the paper and the banana and the potato. Bananas and potatoes also put pressure on paper and knives. But since banana and potato tissues are softer than paper fibers.
When the pressure of the knife has not yet reached the point of destroying the paper fibers, the tissue of the banana has already begun to decompose, while the paper fibers are relatively tough. So, the knife and the paper went into the banana together, and the banana and the potato cracked, but the paper didn't break. <>
Through the above experiments, we found that by wrapping the blade of a knife in paper, we can cut potatoes and bananas smoothly without breaking the paper, and even when we change the paper to a thin and soft facial tissue, we can also cut the potatoes smoothly without the facial tissue breaking.
When the blade of a knife is wrapped with paper and a banana potato is cut, the paper is subjected to the force of the knife, and at the same time, the paper is subjected to the reaction force from the potatoes and bananas.
The two cancel each other out. In addition, due to the flexibility of the paper fibers.
Better than potatoes and bananas, so the paper won't break while cutting potatoes and bananas.
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Anonymous users2024-02-08Because the paper is not only subjected to the force of the knife on the knife, but also by the force brought by the object being cut, the force on the paper is zero, so it cannot be cut.
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Anonymous users2024-02-07The fibers of the paper are relatively tough and soft, when the paper is placed on the blade to cut potatoes and bananas, the potatoes and bananas are cut, and the paper is still intact, indicating that the toughness and softness of the paper are greater than them.
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Anonymous users2024-02-06I don't know, because I haven't heard of paper that can't be cut, unless the material is not paper, but paper is the name.
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