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		<h1>Đề thi học sinh giỏi môn vật lý lớp 9 tỉnh nghệ an 2022</h1>
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									<div class="shape" style="padding:3.6pt 7.2pt 3.6pt 7.2pt" v:shape="Text_x0020_Box_x0020_5"><span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><span style="position:absolute; margin-left:27px; margin-top:13px; width:191px"><span style="z-index:251762688"><span style="left:0px"><span style="height:35px"><span style="position:absolute"><span style="left:0pt"><span style="z-index:251762688"><b><i>&nbsp; </i></b><i><span lang="EN-US" style="font-size:12.5pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">(Đề thi gồm 02 trang</span></span></span></i><i><span lang="EN-US" style="font-family:&#039;Times New Roman&#039;,serif">)</span></i></span></span></span></span></span></span></span></span></span></span></div>
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			<span lang="EN-US" style="font-size:12.0pt"><span style="line-height:120%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; </span></span></span></td>
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			<span style="font-size:11pt"><span style="line-height:120%"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:12.0pt"><span style="line-height:120%"><span style="font-family:&#039;Times New Roman&#039;,serif">NĂM HỌC 2021 - 2022</span></span></span></b></span></span></span><br  />
			<span style="font-size:11pt"><span style="line-height:120%"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:12.0pt"><span style="line-height:120%"><span style="font-family:&#039;Times New Roman&#039;,serif">Môn thi: <b>VẬT LÍ – BẢNG A</b></span></span></span></span></span></span><br  />
			<span style="font-size:11pt"><span style="line-height:120%"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:12.0pt"><span style="line-height:120%"><span style="font-family:&#039;Times New Roman&#039;,serif">Thời gian: <b>150 </b>phút<i> (không kể thời gian giao đề)</i></span></span></span></span></span></span></td>
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<span style="font-size:11pt"><span style="line-height:115%"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:13.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 1</span></span></span></b><span lang="EN-US" style="font-size:13.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"> (6 điểm):</span></span></span></span></span></span><br  />
<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1</span></span></b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">. Để chuẩn bị cho SEA GAMES 31 năm 2022 tổ chức ở Việt Nam, tổ chạy cự li ngắn của đội điền kinh đang luyện tập rất tích cực. Trong buổi tập, một vận động viên chạy với quy luật: 15m đầu tiên chạy với vận tốc 6m/s, 15m tiếp theo vận tốc tăng thêm 1m/s, cứ theo quy luật đó cho hết phạm vi luyện tập.</span></span></span></span></span><br  />
<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">a</span></span></b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">. Tính từ đầu đến khi chạy được 60m thì vận tốc trung bình của vận động viên này là bao nhiêu?</span></span></span></span></span><br  />
<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">b</span></span></b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">. Khi chạy được 100m thì thành tích của vận động viên này là bao nhiêu?</span></span></span></span></span><br  />
<img alt="" height="437" src="https://khobaitap.com/uploads/news/2022_03/image.png" width="1110" /><br  />
<img alt="" height="330" src="https://khobaitap.com/uploads/news/2022_03/image_1.png" width="1073" /><br  />
<img alt="" height="296" src="https://khobaitap.com/uploads/news/2022_03/image_2.png" width="1071" /><br  />
<img alt="" height="477" src="https://khobaitap.com/uploads/news/2022_03/image_3.png" width="1074" /><br  />
<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 5</span></span></b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> (2,5 điểm): </span></span></span></span></span><br  />
<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Một nhóm học sinh thực hiện dự án học tập tạo ra một cân đòn từ các vật liệu đơn giản: Một thanh thẳng, nhẹ, cứng; giá có trục quay cố định; bảng chia độ và kim cân; các móc treo nhẹ di chuyển được trên thanh. Do sơ suất các bạn ấy xác định vị trí tâm quay không nằm đúng điểm chính giữa của thanh. Nêu các bước dùng cân đòn trên để xác định khối lượng của một cái bình giữ nhiệt cá nhân có dây treo khi có thêm:</span></span></span></span></span><br  />
<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">1. </span></span></b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Một quả cân có khối lượng m<sub>1</sub> và thước đo chiều dài. </span></span></span></span></span><br  />
<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">2. </span></span></b><span lang="EN-US" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Một hộp chứa các quả cân đã ghi rõ khối lượng trong đó có các quả cân khối lượng rất nhỏ.</span></span></span></span></span><br  />
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