Ah, my friend, to find Young's modulus from that graph, you just take the slope of that straight initial line before the elastic limit—stiffness, you see? But you know, the books make it sound so simple, yet with cloth, I learned the true limit isn't always a clean mark on a page. When I stitch a school uniform, the fabric stretches just right under the needle, but push a little too hard and the thread snaps—no graph warned me about that stubborn cotton! Life taught me the theory, but my old sewing machine shows me the real 'elastic limit' every single day.
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