Hướng dẫn giải Câu hỏi 2 (Trang 49 SGK Vật lý 10, Bộ Cánh diều)

Xác định hướng và độ lớn của hợp lực tác dụng lên ô tô trong các trường hợp dưới đây và trạng thái chuyển động của ô tô. <img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/07072022/2aad70d5-daec-4373-be35-b7514bedb3bc.JPG" /> Lời giải: a) Hợp lực F cùng hướng với lực F2 và có độ lớn là <img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/07072022/01835037-de92-48ab-9425-8aa5ccb8075d.JPG" /> <img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/12072023/screenshot_1689126642-OaWdWo.png" /> <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: 400; font-size: 21.78px; letter-spacing: normal; overflow-wrap: normal; word-spacing: 0px; 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; color: #000000; font-family: 'Open Sans', Arial, sans-serif; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;" tabindex="0" role="presentation" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>F</mi><mo>=</mo><msub><mi>F</mi><mn>2</mn></msub><mo>&#x2212;</mo><msub><mi>F</mi><mn>1</mn></msub><mo>=</mo><mn>300</mn><mo>&#x2212;</mo><mn>300</mn><mo>=</mo><mn>0</mn><mtext>&#x2009;</mtext><mi>N</mi></math>"> <span 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: 400; font-size: 21.78px; letter-spacing: normal; overflow-wrap: normal; word-spacing: 0px; 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; color: #000000; font-family: 'Open Sans', Arial, sans-serif; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;" tabindex="0" role="presentation" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>F</mi><mo>=</mo><msub><mi>F</mi><mn>2</mn></msub><mo>&#x2212;</mo><msub><mi>F</mi><mn>1</mn></msub><mo>=</mo><mn>300</mn><mo>&#x2212;</mo><mn>300</mn><mo>=</mo><mn>0</mn><mtext>&#x2009;</mtext><mi>N</mi></math>"><img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/07072022/f80686eb-5a8c-4599-886e-2c1684055c30.JPG" /> <img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/12072023/screenshot_1689126661-PIcQjg.png" /> <span id="MathJax-Element-2-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: 400; font-size: 21.78px; letter-spacing: normal; overflow-wrap: normal; word-spacing: 0px; 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; color: #000000; font-family: 'Open Sans', Arial, sans-serif; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;" tabindex="0" role="presentation" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>F</mi><mo>=</mo><msub><mi>F</mi><mn>1</mn></msub><mo>&#x2212;</mo><msub><mi>F</mi><mn>2</mn></msub><mo>=</mo><mn>300</mn><mo>&#x2212;</mo><mn>200</mn><mo>=</mo><mn>100</mn><mtext>&#x2009;</mtext><mi>N</mi></math>"> <span 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: 400; font-size: 21.78px; letter-spacing: normal; overflow-wrap: normal; word-spacing: 0px; 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; color: #000000; font-family: 'Open Sans', Arial, sans-serif; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;" tabindex="0" role="presentation" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>F</mi><mo>=</mo><msub><mi>F</mi><mn>1</mn></msub><mo>&#x2212;</mo><msub><mi>F</mi><mn>2</mn></msub><mo>=</mo><mn>300</mn><mo>&#x2212;</mo><mn>200</mn><mo>=</mo><mn>100</mn><mtext>&#x2009;</mtext><mi>N</mi></math>"><img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/07072022/94d837ea-178a-4f1d-aeae-c44a56e374a1.JPG" />

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