Câu 2: Nêu các tác dụng của ròng rọc, và vận dụng tính lực trong hệ palang cụ thể.
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Khách
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Những câu hỏi liên quan
có 2 loại ròng rọc
ròng rọc cố định giúp làm thay đổi của lực kéo so với khi kéo trực tiếp
ròng rọc động giúp làm lực kéo vật lên nhỏ hưn tronhgj lượng của vật
dùng palăng cho phép giảm giảm cường độ lực kéo
mày ko thoát dược đâu con trai to be 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mà thôi