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Ngày 14/10/2018 |
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Trường THCS Dương Thủy Bài kiểm tra định kỳ lần II
Họ và tên Môn : Vật lý
Lớp : 8 Thời gian : 45 phút
Điểm
Nhận xét của giáo viên
Đề A
Câu 1 : Công cơ học được dùng trong trường hợp nào ? công cơ học phụ thuộc vào yếu tố nào ?
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Câu 2 : Viết công thức tính công suất ? tên gọi và đơn vị đo của các đại lượng có mặt trong công thức ?
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Câu 3 : Khi nào vật có động năng ? động năng của vật phụ thuộc vào những yếu tố nào ? lấy ví dụ về vật có động năng ?
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Câu 4: Mũi tên được bắn đi từ cái cung là nhờ năng lượng của mũi tên hay của cái cung ? Đó là dạng năng lượng nào ?
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Câu 5 : Một cần cẩu nâng một vật nặng 2000kg lên cao 30m hết 5 phút . Tính công suất của cần cẩu ?
Tóm tắt Giải
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Trường THCS Dương Thủy Bài kiểm tra định kỳ lần II
Họ và tên Môn : Vật lý
Lớp : 8 Thời gian : 45 phút
Điểm
Nhận xét của giáo viên
Đề B
Câu 1 : Phát biểu dịnh luật về công ?
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Câu 2 : Viết công thức tính công cơ học ? tên gọi và đơn vị đo của các đại lượng có mặt trong công thức ?
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 3 : Khi nào vật có thế năng hấp dẫn ? Thế năng hấp dẫn của vật phụ thuộc vào những yếu
tố nào ? lấy ví dụ về vật có thế năng hấp dẫn ?
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Câu 4: Búa đập vào đinh làm đinh ngập sâu vòa gỗ . Đinh ngập sâu vào gỗ là nhờ năng lượng nào ? Đó là dạng năng lượng gì ?
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Câu 5 : Một cần cẩu nâng một vật nặng 3000kg lên cao 25m hết 5 phút . Tính công suất của cần cẩu ?
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Họ và tên Môn : Vật lý
Lớp : 8 Thời gian : 45 phút
Điểm
Nhận xét của giáo viên
Đề A
Câu 1 : Công cơ học được dùng trong trường hợp nào ? công cơ học phụ thuộc vào yếu tố nào ?
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 2 : Viết công thức tính công suất ? tên gọi và đơn vị đo của các đại lượng có mặt trong công thức ?
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 3 : Khi nào vật có động năng ? động năng của vật phụ thuộc vào những yếu tố nào ? lấy ví dụ về vật có động năng ?
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 4: Mũi tên được bắn đi từ cái cung là nhờ năng lượng của mũi tên hay của cái cung ? Đó là dạng năng lượng nào ?
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 5 : Một cần cẩu nâng một vật nặng 2000kg lên cao 30m hết 5 phút . Tính công suất của cần cẩu ?
Tóm tắt Giải
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Trường THCS Dương Thủy Bài kiểm tra định kỳ lần II
Họ và tên Môn : Vật lý
Lớp : 8 Thời gian : 45 phút
Điểm
Nhận xét của giáo viên
Đề B
Câu 1 : Phát biểu dịnh luật về công ?
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 2 : Viết công thức tính công cơ học ? tên gọi và đơn vị đo của các đại lượng có mặt trong công thức ?
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 3 : Khi nào vật có thế năng hấp dẫn ? Thế năng hấp dẫn của vật phụ thuộc vào những yếu
tố nào ? lấy ví dụ về vật có thế năng hấp dẫn ?
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 4: Búa đập vào đinh làm đinh ngập sâu vòa gỗ . Đinh ngập sâu vào gỗ là nhờ năng lượng nào ? Đó là dạng năng lượng gì ?
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Câu 5 : Một cần cẩu nâng một vật nặng 3000kg lên cao 25m hết 5 phút . Tính công suất của cần cẩu ?
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