Bài 2: Sự biến dạng
Hướng dẫn giải Câu hỏi 2 (Trang 115 SGK Vật lý 10, Bộ Cánh diều)
<p>C&aacute;c kết quả trong bảng 2.1 gợi &yacute; cho bạn mối li&ecirc;n hệ g&igrave;? H&atilde;y ph&aacute;t biểu mối li&ecirc;n hệ đ&oacute;.</p> <p><img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/28072022/0d0a5888-ac5e-4615-9c13-0c812628493b.JPG" /></p> <p><strong>Lời giải:</strong></p> <p>Từ bảng kết quả, ta thấy:&nbsp;<span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML" style="box-sizing: border-box; display: inline-block; line-height: 0; text-indent: 0px; text-align: left; text-transform: none; font-style: normal; font-weight: normal; font-size: 21.78px; letter-spacing: normal; overflow-wrap: normal; word-spacing: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; position: relative;" tabindex="0" role="presentation" data-mathml="&lt;math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;&gt;&lt;mfrac&gt;&lt;msub&gt;&lt;mi&gt;P&lt;/mi&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;mrow&gt;&lt;mi&gt;&amp;#x394;&lt;/mi&gt;&lt;msub&gt;&lt;mi mathvariant=&quot;script&quot;&gt;l&lt;/mi&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mfrac&gt;&lt;msub&gt;&lt;mi&gt;P&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;mrow&gt;&lt;mi&gt;&amp;#x394;&lt;/mi&gt;&lt;msub&gt;&lt;mi mathvariant=&quot;script&quot;&gt;l&lt;/mi&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mfrac&gt;&lt;msub&gt;&lt;mi&gt;P&lt;/mi&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/msub&gt;&lt;mrow&gt;&lt;mi&gt;&amp;#x394;&lt;/mi&gt;&lt;msub&gt;&lt;mi mathvariant=&quot;script&quot;&gt;l&lt;/mi&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mfrac&gt;&lt;msub&gt;&lt;mi&gt;P&lt;/mi&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/msub&gt;&lt;mrow&gt;&lt;mi&gt;&amp;#x394;&lt;/mi&gt;&lt;msub&gt;&lt;mi mathvariant=&quot;script&quot;&gt;l&lt;/mi&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mfrac&gt;&lt;msub&gt;&lt;mi&gt;P&lt;/mi&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/msub&gt;&lt;mrow&gt;&lt;mi&gt;&amp;#x394;&lt;/mi&gt;&lt;msub&gt;&lt;mi mathvariant=&quot;script&quot;&gt;l&lt;/mi&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;01&lt;/mn&gt;&lt;/math&gt;"><span id="MJXc-Node-1" class="mjx-math" aria-hidden="true"><span id="MJXc-Node-2" class="mjx-mrow"><span id="MJXc-Node-3" class="mjx-mfrac"><span class="mjx-box MJXc-stacked"><span class="mjx-numerator"><span id="MJXc-Node-4" class="mjx-msub"><span class="mjx-base"><span id="MJXc-Node-5" class="mjx-mi"></span></span></span></span></span></span></span></span><math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><msub><mi>P</mi><mn>1</mn></msub><mrow><mo>∆</mo><msub><mi>l</mi><mn>1</mn></msub></mrow></mfrac><mo>=</mo><mfrac><msub><mi>P</mi><mn>2</mn></msub><mrow><mo>∆</mo><msub><mi>l</mi><mn>2</mn></msub></mrow></mfrac><mo>=</mo><mfrac><msub><mi>P</mi><mn>3</mn></msub><mrow><mo>∆</mo><msub><mi>l</mi><mn>3</mn></msub></mrow></mfrac><mo>=</mo><mfrac><msub><mi>P</mi><mn>4</mn></msub><mrow><mo>∆</mo><msub><mi>l</mi><mn>4</mn></msub></mrow></mfrac><mo>=</mo><mfrac><msub><mi>P</mi><mn>5</mn></msub><mrow><mo>∆</mo><msub><mi>l</mi><mn>5</mn></msub></mrow></mfrac><mo>=</mo><mn>0</mn><mo>,</mo><mn>01</mn></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mn></mn></math></span></p> <p>Trọng lượng vật v&agrave; độ gi&atilde;n tỉ lệ thuận với nhau theo một hệ số tỉ lệ x&aacute;c định.</p>
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